/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:08:51,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:08:51,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:08:51,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:08:51,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 21:08:51,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:08:51,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:08:51,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:08:51,881 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:08:51,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:08:51,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:08:51,884 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:08:51,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:08:51,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:08:51,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:08:51,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:08:51,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:08:51,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:08:51,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:08:51,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:08:51,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:08:51,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:08:51,885 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:08:51,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:08:51,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:08:51,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:08:51,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:08:51,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:08:51,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:08:51,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:08:51,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:08:51,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:08:51,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:08:51,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:08:51,887 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:08:51,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:08:51,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:08:52,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:08:52,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:08:52,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:08:52,110 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:08:52,111 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:08:52,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2021-03-10 21:08:52,135 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-03-10 21:08:52,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:08:52,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:08:52,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:08:52,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:08:52,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:08:52,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/1) ... [2021-03-10 21:08:52,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/1) ... [2021-03-10 21:08:52,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:08:52,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:08:52,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:08:52,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:08:52,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/1) ... [2021-03-10 21:08:52,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/1) ... [2021-03-10 21:08:52,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/1) ... [2021-03-10 21:08:52,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/1) ... [2021-03-10 21:08:52,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/1) ... [2021-03-10 21:08:52,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/1) ... [2021-03-10 21:08:52,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/1) ... [2021-03-10 21:08:52,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:08:52,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:08:52,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:08:52,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:08:52,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:08:52,232 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:08:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:08:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:08:52,232 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:08:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:08:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:08:52,232 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:08:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:08:52,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:08:52,233 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:08:52,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:08:52,347 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 21:08:52,348 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:08:52 BoogieIcfgContainer [2021-03-10 21:08:52,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:08:52,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:08:52,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:08:52,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:08:52,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:08:52" (1/2) ... [2021-03-10 21:08:52,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7faf5f00 and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:08:52, skipping insertion in model container [2021-03-10 21:08:52,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:08:52" (2/2) ... [2021-03-10 21:08:52,352 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-03-10 21:08:52,355 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:08:52,355 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:08:52,358 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:08:52,358 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:08:52,376 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:08:52,385 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:08:52,396 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:08:52,396 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:08:52,396 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:08:52,396 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:08:52,396 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:08:52,396 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:08:52,397 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:08:52,397 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:08:52,402 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-03-10 21:08:52,409 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:08:52,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:52,414 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:52,415 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:52,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1540416471, now seen corresponding path program 1 times [2021-03-10 21:08:52,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:52,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143387899] [2021-03-10 21:08:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:52,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143387899] [2021-03-10 21:08:52,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:08:52,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 21:08:52,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286495169] [2021-03-10 21:08:52,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 21:08:52,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 21:08:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:08:52,511 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:52,544 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-03-10 21:08:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 21:08:52,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:08:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:52,552 INFO L225 Difference]: With dead ends: 102 [2021-03-10 21:08:52,552 INFO L226 Difference]: Without dead ends: 95 [2021-03-10 21:08:52,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:08:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-03-10 21:08:52,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-03-10 21:08:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2839506172839505) internal successors, (185), 81 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-03-10 21:08:52,578 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-03-10 21:08:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:52,578 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-03-10 21:08:52,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-03-10 21:08:52,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:08:52,579 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:52,580 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:52,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:08:52,580 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:52,580 INFO L82 PathProgramCache]: Analyzing trace with hash -214361416, now seen corresponding path program 1 times [2021-03-10 21:08:52,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:52,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361928837] [2021-03-10 21:08:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:52,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361928837] [2021-03-10 21:08:52,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:08:52,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:08:52,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270455984] [2021-03-10 21:08:52,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:08:52,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:52,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:08:52,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:08:52,638 INFO L87 Difference]: Start difference. First operand 82 states and 185 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:52,718 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2021-03-10 21:08:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:08:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:08:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:52,720 INFO L225 Difference]: With dead ends: 160 [2021-03-10 21:08:52,720 INFO L226 Difference]: Without dead ends: 160 [2021-03-10 21:08:52,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:08:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-03-10 21:08:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2021-03-10 21:08:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-03-10 21:08:52,733 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-03-10 21:08:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:52,733 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-03-10 21:08:52,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-03-10 21:08:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:08:52,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:52,734 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:52,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:08:52,734 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:52,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:52,735 INFO L82 PathProgramCache]: Analyzing trace with hash 110711837, now seen corresponding path program 1 times [2021-03-10 21:08:52,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:52,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374722206] [2021-03-10 21:08:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374722206] [2021-03-10 21:08:52,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:08:52,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:08:52,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556814233] [2021-03-10 21:08:52,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:08:52,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:52,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:08:52,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:08:52,764 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:52,826 INFO L93 Difference]: Finished difference Result 171 states and 385 transitions. [2021-03-10 21:08:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:08:52,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:08:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:52,832 INFO L225 Difference]: With dead ends: 171 [2021-03-10 21:08:52,832 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 21:08:52,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:08:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 21:08:52,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 116. [2021-03-10 21:08:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.2956521739130435) internal successors, (264), 115 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 264 transitions. [2021-03-10 21:08:52,850 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 264 transitions. Word has length 14 [2021-03-10 21:08:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:52,850 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 264 transitions. [2021-03-10 21:08:52,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 264 transitions. [2021-03-10 21:08:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:08:52,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:52,851 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:52,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:08:52,852 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash -632263843, now seen corresponding path program 2 times [2021-03-10 21:08:52,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:52,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498856897] [2021-03-10 21:08:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:52,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498856897] [2021-03-10 21:08:52,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451705070] [2021-03-10 21:08:52,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:52,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:08:52,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:08:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:52,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:52,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-03-10 21:08:52,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419205302] [2021-03-10 21:08:52,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:08:52,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:08:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:08:52,966 INFO L87 Difference]: Start difference. First operand 116 states and 264 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:53,007 INFO L93 Difference]: Finished difference Result 141 states and 326 transitions. [2021-03-10 21:08:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:08:53,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:08:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:53,008 INFO L225 Difference]: With dead ends: 141 [2021-03-10 21:08:53,008 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 21:08:53,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:08:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 21:08:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-03-10 21:08:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2941176470588234) internal successors, (234), 102 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 234 transitions. [2021-03-10 21:08:53,014 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 234 transitions. Word has length 14 [2021-03-10 21:08:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:53,014 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 234 transitions. [2021-03-10 21:08:53,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 234 transitions. [2021-03-10 21:08:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:08:53,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:53,015 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:53,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:53,231 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:53,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1209640048, now seen corresponding path program 2 times [2021-03-10 21:08:53,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:53,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563557732] [2021-03-10 21:08:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:53,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563557732] [2021-03-10 21:08:53,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:08:53,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:08:53,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520564681] [2021-03-10 21:08:53,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:08:53,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:53,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:08:53,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:08:53,302 INFO L87 Difference]: Start difference. First operand 103 states and 234 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:53,339 INFO L93 Difference]: Finished difference Result 144 states and 331 transitions. [2021-03-10 21:08:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:08:53,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:08:53,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:53,340 INFO L225 Difference]: With dead ends: 144 [2021-03-10 21:08:53,340 INFO L226 Difference]: Without dead ends: 142 [2021-03-10 21:08:53,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:08:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-03-10 21:08:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-03-10 21:08:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.284313725490196) internal successors, (233), 102 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-03-10 21:08:53,352 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-03-10 21:08:53,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:53,352 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-03-10 21:08:53,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,352 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-03-10 21:08:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:08:53,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:53,355 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:53,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:08:53,356 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash -10930008, now seen corresponding path program 1 times [2021-03-10 21:08:53,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:53,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895587078] [2021-03-10 21:08:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:53,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895587078] [2021-03-10 21:08:53,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965316711] [2021-03-10 21:08:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:53,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:53,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:53,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:53,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-03-10 21:08:53,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92731727] [2021-03-10 21:08:53,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:08:53,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:08:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:08:53,520 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:53,559 INFO L93 Difference]: Finished difference Result 200 states and 450 transitions. [2021-03-10 21:08:53,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:08:53,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:08:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:53,560 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:08:53,560 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 21:08:53,560 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:08:53,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 21:08:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 143. [2021-03-10 21:08:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-03-10 21:08:53,565 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-03-10 21:08:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:53,566 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-03-10 21:08:53,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-03-10 21:08:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:08:53,566 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:53,566 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:53,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:53,777 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:53,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1675583288, now seen corresponding path program 1 times [2021-03-10 21:08:53,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:53,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928061843] [2021-03-10 21:08:53,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:53,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928061843] [2021-03-10 21:08:53,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933077861] [2021-03-10 21:08:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:08:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:53,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:53,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:53,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:53,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-03-10 21:08:53,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937904288] [2021-03-10 21:08:53,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:08:53,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:53,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:08:53,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:08:53,877 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:53,931 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2021-03-10 21:08:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:08:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:08:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:53,933 INFO L225 Difference]: With dead ends: 248 [2021-03-10 21:08:53,933 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 21:08:53,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:08:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 21:08:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-03-10 21:08:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.4248704663212437) internal successors, (468), 193 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-03-10 21:08:53,951 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-03-10 21:08:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:53,951 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-03-10 21:08:53,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-03-10 21:08:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:08:53,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:53,952 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:54,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:54,166 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:54,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1837184638, now seen corresponding path program 2 times [2021-03-10 21:08:54,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:54,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890560739] [2021-03-10 21:08:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:08:54,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890560739] [2021-03-10 21:08:54,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:08:54,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:08:54,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444425914] [2021-03-10 21:08:54,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:08:54,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:54,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:08:54,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:08:54,208 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:54,236 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2021-03-10 21:08:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:08:54,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:08:54,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:54,239 INFO L225 Difference]: With dead ends: 311 [2021-03-10 21:08:54,239 INFO L226 Difference]: Without dead ends: 304 [2021-03-10 21:08:54,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:08:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-03-10 21:08:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-03-10 21:08:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.4701195219123506) internal successors, (620), 251 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-03-10 21:08:54,246 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-03-10 21:08:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:54,246 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-03-10 21:08:54,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-03-10 21:08:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:08:54,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:54,247 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:54,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 21:08:54,247 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1678798648, now seen corresponding path program 1 times [2021-03-10 21:08:54,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:54,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139265578] [2021-03-10 21:08:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:54,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139265578] [2021-03-10 21:08:54,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:08:54,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:08:54,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995278810] [2021-03-10 21:08:54,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:08:54,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:54,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:08:54,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:08:54,281 INFO L87 Difference]: Start difference. First operand 252 states and 620 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:54,304 INFO L93 Difference]: Finished difference Result 243 states and 574 transitions. [2021-03-10 21:08:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:08:54,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:08:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:54,305 INFO L225 Difference]: With dead ends: 243 [2021-03-10 21:08:54,305 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:08:54,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:08:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:08:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-03-10 21:08:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.4009661835748792) internal successors, (497), 207 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-03-10 21:08:54,309 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-03-10 21:08:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:54,309 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-03-10 21:08:54,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-03-10 21:08:54,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:08:54,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:54,311 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:54,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 21:08:54,311 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:54,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:54,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1963262152, now seen corresponding path program 2 times [2021-03-10 21:08:54,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:54,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204382382] [2021-03-10 21:08:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:54,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204382382] [2021-03-10 21:08:54,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:08:54,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:08:54,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010137540] [2021-03-10 21:08:54,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:08:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:08:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:08:54,355 INFO L87 Difference]: Start difference. First operand 208 states and 497 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:54,385 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2021-03-10 21:08:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:08:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:08:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:54,386 INFO L225 Difference]: With dead ends: 222 [2021-03-10 21:08:54,386 INFO L226 Difference]: Without dead ends: 222 [2021-03-10 21:08:54,386 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:08:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-03-10 21:08:54,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-03-10 21:08:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3846153846153846) internal successors, (527), 221 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-03-10 21:08:54,390 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-03-10 21:08:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:54,390 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-03-10 21:08:54,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-03-10 21:08:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:54,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:54,391 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:54,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 21:08:54,391 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:54,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:54,391 INFO L82 PathProgramCache]: Analyzing trace with hash 215291064, now seen corresponding path program 3 times [2021-03-10 21:08:54,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:54,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884623208] [2021-03-10 21:08:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:54,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884623208] [2021-03-10 21:08:54,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371481323] [2021-03-10 21:08:54,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:54,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:08:54,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:54,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:08:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:54,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:08:54,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-03-10 21:08:54,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122155110] [2021-03-10 21:08:54,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:08:54,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:54,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:08:54,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:08:54,644 INFO L87 Difference]: Start difference. First operand 222 states and 527 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:54,813 INFO L93 Difference]: Finished difference Result 421 states and 987 transitions. [2021-03-10 21:08:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:08:54,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:54,816 INFO L225 Difference]: With dead ends: 421 [2021-03-10 21:08:54,816 INFO L226 Difference]: Without dead ends: 414 [2021-03-10 21:08:54,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:08:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-03-10 21:08:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-03-10 21:08:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-03-10 21:08:54,821 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-03-10 21:08:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:54,822 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-03-10 21:08:54,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-03-10 21:08:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:54,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:54,822 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:55,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:55,031 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:55,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:55,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2043788104, now seen corresponding path program 4 times [2021-03-10 21:08:55,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:55,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905093340] [2021-03-10 21:08:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:55,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905093340] [2021-03-10 21:08:55,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189610095] [2021-03-10 21:08:55,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:08:55,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:08:55,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:55,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:08:55,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:55,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:08:55,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-03-10 21:08:55,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802676987] [2021-03-10 21:08:55,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:08:55,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:55,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:08:55,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:08:55,171 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:55,266 INFO L93 Difference]: Finished difference Result 592 states and 1376 transitions. [2021-03-10 21:08:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:08:55,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:55,269 INFO L225 Difference]: With dead ends: 592 [2021-03-10 21:08:55,269 INFO L226 Difference]: Without dead ends: 592 [2021-03-10 21:08:55,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:08:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-03-10 21:08:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-03-10 21:08:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.541333333333333) internal successors, (953), 375 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-03-10 21:08:55,279 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-03-10 21:08:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:55,279 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-03-10 21:08:55,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-03-10 21:08:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:55,280 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:55,280 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:55,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 21:08:55,497 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1610963566, now seen corresponding path program 5 times [2021-03-10 21:08:55,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:55,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118826745] [2021-03-10 21:08:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:55,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118826745] [2021-03-10 21:08:55,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357937151] [2021-03-10 21:08:55,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:55,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:08:55,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:55,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:55,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:55,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:55,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-03-10 21:08:55,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933787360] [2021-03-10 21:08:55,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:08:55,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:55,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:08:55,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:08:55,599 INFO L87 Difference]: Start difference. First operand 376 states and 953 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:55,689 INFO L93 Difference]: Finished difference Result 751 states and 1816 transitions. [2021-03-10 21:08:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:08:55,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:55,692 INFO L225 Difference]: With dead ends: 751 [2021-03-10 21:08:55,692 INFO L226 Difference]: Without dead ends: 751 [2021-03-10 21:08:55,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:08:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-03-10 21:08:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-03-10 21:08:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.659695817490494) internal successors, (1399), 526 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-03-10 21:08:55,703 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-03-10 21:08:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:55,704 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-03-10 21:08:55,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-03-10 21:08:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:55,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:55,705 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:55,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:55,917 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:55,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1876435461, now seen corresponding path program 6 times [2021-03-10 21:08:55,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:55,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014014034] [2021-03-10 21:08:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:55,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014014034] [2021-03-10 21:08:55,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137961527] [2021-03-10 21:08:55,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:08:55,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:08:55,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:55,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:55,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:56,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:56,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-03-10 21:08:56,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715112157] [2021-03-10 21:08:56,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:08:56,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:56,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:08:56,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:08:56,018 INFO L87 Difference]: Start difference. First operand 527 states and 1399 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:56,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:56,077 INFO L93 Difference]: Finished difference Result 960 states and 2485 transitions. [2021-03-10 21:08:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:08:56,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:56,081 INFO L225 Difference]: With dead ends: 960 [2021-03-10 21:08:56,081 INFO L226 Difference]: Without dead ends: 956 [2021-03-10 21:08:56,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:08:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-03-10 21:08:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-03-10 21:08:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.752551020408163) internal successors, (2158), 784 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-03-10 21:08:56,098 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-03-10 21:08:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:56,099 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-03-10 21:08:56,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:56,099 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-03-10 21:08:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:56,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:56,101 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:56,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:56,311 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:56,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1254555051, now seen corresponding path program 7 times [2021-03-10 21:08:56,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:56,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896767207] [2021-03-10 21:08:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:56,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896767207] [2021-03-10 21:08:56,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482744337] [2021-03-10 21:08:56,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:56,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:56,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:56,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:56,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-03-10 21:08:56,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504737056] [2021-03-10 21:08:56,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:08:56,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:56,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:08:56,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:08:56,395 INFO L87 Difference]: Start difference. First operand 785 states and 2158 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:56,465 INFO L93 Difference]: Finished difference Result 966 states and 2482 transitions. [2021-03-10 21:08:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:08:56,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:56,468 INFO L225 Difference]: With dead ends: 966 [2021-03-10 21:08:56,468 INFO L226 Difference]: Without dead ends: 966 [2021-03-10 21:08:56,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:08:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-03-10 21:08:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-03-10 21:08:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.739795918367347) internal successors, (2148), 784 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-03-10 21:08:56,483 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-03-10 21:08:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:56,484 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-03-10 21:08:56,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-03-10 21:08:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:56,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:56,485 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:56,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 21:08:56,692 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash 322738604, now seen corresponding path program 8 times [2021-03-10 21:08:56,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:56,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317832670] [2021-03-10 21:08:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:56,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317832670] [2021-03-10 21:08:56,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001891341] [2021-03-10 21:08:56,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:56,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:08:56,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:56,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:56,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:56,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:56,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 21:08:56,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500487048] [2021-03-10 21:08:56,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:08:56,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:56,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:08:56,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:08:56,778 INFO L87 Difference]: Start difference. First operand 785 states and 2148 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:56,818 INFO L93 Difference]: Finished difference Result 861 states and 2300 transitions. [2021-03-10 21:08:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:08:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:56,821 INFO L225 Difference]: With dead ends: 861 [2021-03-10 21:08:56,822 INFO L226 Difference]: Without dead ends: 858 [2021-03-10 21:08:56,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:08:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-03-10 21:08:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-03-10 21:08:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.7346153846153847) internal successors, (2133), 780 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-03-10 21:08:56,835 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-03-10 21:08:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:56,835 INFO L480 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-03-10 21:08:56,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:56,835 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-03-10 21:08:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:56,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:56,836 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:57,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:57,053 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1057166664, now seen corresponding path program 9 times [2021-03-10 21:08:57,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:57,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228286061] [2021-03-10 21:08:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:57,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228286061] [2021-03-10 21:08:57,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780167011] [2021-03-10 21:08:57,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:57,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:08:57,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:57,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:57,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:57,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:57,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 21:08:57,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375174424] [2021-03-10 21:08:57,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:08:57,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:57,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:08:57,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:08:57,128 INFO L87 Difference]: Start difference. First operand 781 states and 2133 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:57,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:57,200 INFO L93 Difference]: Finished difference Result 1114 states and 2914 transitions. [2021-03-10 21:08:57,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:08:57,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:57,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:57,204 INFO L225 Difference]: With dead ends: 1114 [2021-03-10 21:08:57,204 INFO L226 Difference]: Without dead ends: 1114 [2021-03-10 21:08:57,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:08:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-03-10 21:08:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-03-10 21:08:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.771714922048998) internal successors, (2489), 898 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-03-10 21:08:57,221 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-03-10 21:08:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:57,221 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-03-10 21:08:57,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-03-10 21:08:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:57,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:57,222 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:57,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 21:08:57,431 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:57,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:57,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1634542869, now seen corresponding path program 10 times [2021-03-10 21:08:57,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:57,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372390167] [2021-03-10 21:08:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:57,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372390167] [2021-03-10 21:08:57,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683468969] [2021-03-10 21:08:57,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:57,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:08:57,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:57,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:57,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:57,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:57,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-03-10 21:08:57,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042537164] [2021-03-10 21:08:57,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:08:57,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:57,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:08:57,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:08:57,522 INFO L87 Difference]: Start difference. First operand 899 states and 2489 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:57,590 INFO L93 Difference]: Finished difference Result 1380 states and 3776 transitions. [2021-03-10 21:08:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:08:57,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:57,594 INFO L225 Difference]: With dead ends: 1380 [2021-03-10 21:08:57,594 INFO L226 Difference]: Without dead ends: 1370 [2021-03-10 21:08:57,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:08:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-03-10 21:08:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-03-10 21:08:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8247758761206194) internal successors, (3466), 1227 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-03-10 21:08:57,618 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-03-10 21:08:57,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:57,618 INFO L480 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-03-10 21:08:57,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:57,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-03-10 21:08:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:57,619 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:57,619 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:57,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 21:08:57,836 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:57,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2038544017, now seen corresponding path program 11 times [2021-03-10 21:08:57,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:57,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048556882] [2021-03-10 21:08:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:57,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048556882] [2021-03-10 21:08:57,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104536989] [2021-03-10 21:08:57,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:57,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:08:57,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:57,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:57,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:57,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:57,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-03-10 21:08:57,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859348409] [2021-03-10 21:08:57,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:08:57,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:57,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:08:57,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:08:57,928 INFO L87 Difference]: Start difference. First operand 1228 states and 3466 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:57,990 INFO L93 Difference]: Finished difference Result 1400 states and 3809 transitions. [2021-03-10 21:08:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:08:57,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:57,996 INFO L225 Difference]: With dead ends: 1400 [2021-03-10 21:08:57,996 INFO L226 Difference]: Without dead ends: 1400 [2021-03-10 21:08:57,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:08:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-03-10 21:08:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-03-10 21:08:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.814755412991179) internal successors, (3510), 1247 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-03-10 21:08:58,017 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-03-10 21:08:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:58,017 INFO L480 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-03-10 21:08:58,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-03-10 21:08:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:58,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:58,019 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:58,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:08:58,236 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:58,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:58,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1106727570, now seen corresponding path program 12 times [2021-03-10 21:08:58,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:58,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106227479] [2021-03-10 21:08:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:58,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106227479] [2021-03-10 21:08:58,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42091252] [2021-03-10 21:08:58,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:58,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:08:58,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:58,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:08:58,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:58,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 21:08:58,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843428763] [2021-03-10 21:08:58,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:08:58,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:58,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:08:58,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:08:58,317 INFO L87 Difference]: Start difference. First operand 1248 states and 3510 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:58,354 INFO L93 Difference]: Finished difference Result 1485 states and 3980 transitions. [2021-03-10 21:08:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:08:58,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:58,359 INFO L225 Difference]: With dead ends: 1485 [2021-03-10 21:08:58,359 INFO L226 Difference]: Without dead ends: 1482 [2021-03-10 21:08:58,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:08:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-03-10 21:08:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-03-10 21:08:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.8086469175340274) internal successors, (3508), 1249 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-03-10 21:08:58,381 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-03-10 21:08:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:58,382 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-03-10 21:08:58,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-03-10 21:08:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:58,383 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:58,383 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:58,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:58,595 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:58,595 INFO L82 PathProgramCache]: Analyzing trace with hash 400971561, now seen corresponding path program 13 times [2021-03-10 21:08:58,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:58,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544178613] [2021-03-10 21:08:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:58,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544178613] [2021-03-10 21:08:58,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040492990] [2021-03-10 21:08:58,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:08:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:58,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:58,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:58,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-03-10 21:08:58,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118160621] [2021-03-10 21:08:58,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:08:58,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:08:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:08:58,688 INFO L87 Difference]: Start difference. First operand 1250 states and 3508 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:58,779 INFO L93 Difference]: Finished difference Result 1426 states and 3852 transitions. [2021-03-10 21:08:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:08:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:58,784 INFO L225 Difference]: With dead ends: 1426 [2021-03-10 21:08:58,784 INFO L226 Difference]: Without dead ends: 1426 [2021-03-10 21:08:58,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:08:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-03-10 21:08:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-03-10 21:08:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.8003355704697985) internal successors, (3338), 1192 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-03-10 21:08:58,802 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-03-10 21:08:58,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:58,802 INFO L480 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-03-10 21:08:58,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:58,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-03-10 21:08:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:08:58,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:58,803 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:59,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:59,018 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:59,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1313790136, now seen corresponding path program 14 times [2021-03-10 21:08:59,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:59,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448067530] [2021-03-10 21:08:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:59,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448067530] [2021-03-10 21:08:59,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26655213] [2021-03-10 21:08:59,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:59,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:08:59,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:08:59,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:08:59,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:59,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:59,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 21:08:59,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327517328] [2021-03-10 21:08:59,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:08:59,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:59,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:08:59,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:08:59,116 INFO L87 Difference]: Start difference. First operand 1193 states and 3338 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:59,172 INFO L93 Difference]: Finished difference Result 1396 states and 3748 transitions. [2021-03-10 21:08:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:08:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:08:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:59,176 INFO L225 Difference]: With dead ends: 1396 [2021-03-10 21:08:59,176 INFO L226 Difference]: Without dead ends: 1382 [2021-03-10 21:08:59,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:08:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-03-10 21:08:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-03-10 21:08:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.7779605263157894) internal successors, (3378), 1216 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-03-10 21:08:59,195 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-03-10 21:08:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:59,205 INFO L480 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-03-10 21:08:59,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-03-10 21:08:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:08:59,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:59,207 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:59,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 21:08:59,422 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1149983723, now seen corresponding path program 1 times [2021-03-10 21:08:59,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:08:59,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762916099] [2021-03-10 21:08:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:08:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:59,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762916099] [2021-03-10 21:08:59,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733330988] [2021-03-10 21:08:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:08:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:08:59,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:08:59,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:08:59,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-03-10 21:08:59,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:08:59,587 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-03-10 21:08:59,587 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:08:59,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:08:59,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-03-10 21:08:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:08:59,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:08:59,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:08:59,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162317341] [2021-03-10 21:08:59,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:08:59,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:08:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:08:59,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:08:59,594 INFO L87 Difference]: Start difference. First operand 1217 states and 3378 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:08:59,748 INFO L93 Difference]: Finished difference Result 2021 states and 5186 transitions. [2021-03-10 21:08:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:08:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:08:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:08:59,755 INFO L225 Difference]: With dead ends: 2021 [2021-03-10 21:08:59,755 INFO L226 Difference]: Without dead ends: 2014 [2021-03-10 21:08:59,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:08:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-03-10 21:08:59,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1712. [2021-03-10 21:08:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1711 states have (on average 2.679135008766803) internal successors, (4584), 1711 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 4584 transitions. [2021-03-10 21:08:59,783 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 4584 transitions. Word has length 23 [2021-03-10 21:08:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:08:59,784 INFO L480 AbstractCegarLoop]: Abstraction has 1712 states and 4584 transitions. [2021-03-10 21:08:59,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:08:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 4584 transitions. [2021-03-10 21:08:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:08:59,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:08:59,785 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:08:59,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:08:59,999 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:08:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:08:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash -877014541, now seen corresponding path program 15 times [2021-03-10 21:08:59,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:00,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572180295] [2021-03-10 21:09:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:09:00,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572180295] [2021-03-10 21:09:00,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52434545] [2021-03-10 21:09:00,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:00,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:09:00,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:00,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:00,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:09:00,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:00,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 21:09:00,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904234712] [2021-03-10 21:09:00,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:09:00,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:00,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:09:00,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:00,095 INFO L87 Difference]: Start difference. First operand 1712 states and 4584 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:00,144 INFO L93 Difference]: Finished difference Result 2070 states and 5461 transitions. [2021-03-10 21:09:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:09:00,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:09:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:00,149 INFO L225 Difference]: With dead ends: 2070 [2021-03-10 21:09:00,149 INFO L226 Difference]: Without dead ends: 2063 [2021-03-10 21:09:00,150 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:00,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-03-10 21:09:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1834. [2021-03-10 21:09:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 2.6879432624113475) internal successors, (4927), 1833 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 4927 transitions. [2021-03-10 21:09:00,176 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 4927 transitions. Word has length 23 [2021-03-10 21:09:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:00,176 INFO L480 AbstractCegarLoop]: Abstraction has 1834 states and 4927 transitions. [2021-03-10 21:09:00,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 4927 transitions. [2021-03-10 21:09:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:09:00,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:00,178 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:00,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:09:00,391 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:00,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1516662741, now seen corresponding path program 1 times [2021-03-10 21:09:00,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:00,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314107269] [2021-03-10 21:09:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:00,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314107269] [2021-03-10 21:09:00,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269913138] [2021-03-10 21:09:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:00,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:00,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:00,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:00,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:09:00,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761628502] [2021-03-10 21:09:00,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:00,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:00,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:00,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:00,532 INFO L87 Difference]: Start difference. First operand 1834 states and 4927 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:00,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:00,626 INFO L93 Difference]: Finished difference Result 1663 states and 4254 transitions. [2021-03-10 21:09:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:00,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:09:00,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:00,629 INFO L225 Difference]: With dead ends: 1663 [2021-03-10 21:09:00,629 INFO L226 Difference]: Without dead ends: 1544 [2021-03-10 21:09:00,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-03-10 21:09:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 979. [2021-03-10 21:09:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 2.6768916155419222) internal successors, (2618), 978 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 2618 transitions. [2021-03-10 21:09:00,644 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 2618 transitions. Word has length 23 [2021-03-10 21:09:00,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:00,645 INFO L480 AbstractCegarLoop]: Abstraction has 979 states and 2618 transitions. [2021-03-10 21:09:00,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 2618 transitions. [2021-03-10 21:09:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:09:00,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:00,646 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:00,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 21:09:00,859 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:00,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:00,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2072587809, now seen corresponding path program 2 times [2021-03-10 21:09:00,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:00,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194567534] [2021-03-10 21:09:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:00,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194567534] [2021-03-10 21:09:00,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857371302] [2021-03-10 21:09:00,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:00,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:00,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:00,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:00,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:00,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 21:09:00,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794361039] [2021-03-10 21:09:00,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:00,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:00,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:00,989 INFO L87 Difference]: Start difference. First operand 979 states and 2618 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:01,097 INFO L93 Difference]: Finished difference Result 1181 states and 3013 transitions. [2021-03-10 21:09:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:09:01,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:09:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:01,099 INFO L225 Difference]: With dead ends: 1181 [2021-03-10 21:09:01,099 INFO L226 Difference]: Without dead ends: 1181 [2021-03-10 21:09:01,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-03-10 21:09:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1006. [2021-03-10 21:09:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 2.6676616915422886) internal successors, (2681), 1005 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 2681 transitions. [2021-03-10 21:09:01,113 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 2681 transitions. Word has length 23 [2021-03-10 21:09:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:01,114 INFO L480 AbstractCegarLoop]: Abstraction has 1006 states and 2681 transitions. [2021-03-10 21:09:01,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 2681 transitions. [2021-03-10 21:09:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:09:01,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:01,115 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:01,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 21:09:01,329 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:01,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1575503784, now seen corresponding path program 2 times [2021-03-10 21:09:01,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:01,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573079389] [2021-03-10 21:09:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:01,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573079389] [2021-03-10 21:09:01,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197856337] [2021-03-10 21:09:01,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:01,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:01,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:01,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:09:01,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:01,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:01,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-03-10 21:09:01,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351203383] [2021-03-10 21:09:01,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:01,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:01,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:01,438 INFO L87 Difference]: Start difference. First operand 1006 states and 2681 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:01,513 INFO L93 Difference]: Finished difference Result 1238 states and 3153 transitions. [2021-03-10 21:09:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:01,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:09:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:01,515 INFO L225 Difference]: With dead ends: 1238 [2021-03-10 21:09:01,515 INFO L226 Difference]: Without dead ends: 1216 [2021-03-10 21:09:01,515 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-03-10 21:09:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1010. [2021-03-10 21:09:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 2.653121902874133) internal successors, (2677), 1009 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 2677 transitions. [2021-03-10 21:09:01,536 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 2677 transitions. Word has length 23 [2021-03-10 21:09:01,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:01,537 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 2677 transitions. [2021-03-10 21:09:01,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 2677 transitions. [2021-03-10 21:09:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:09:01,540 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:01,540 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:01,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 21:09:01,755 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1556804075, now seen corresponding path program 3 times [2021-03-10 21:09:01,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:01,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752846064] [2021-03-10 21:09:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:01,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752846064] [2021-03-10 21:09:01,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566009213] [2021-03-10 21:09:01,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:01,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:09:01,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:01,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:01,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:01,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:01,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-03-10 21:09:01,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691615137] [2021-03-10 21:09:01,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:01,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:01,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:01,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:01,870 INFO L87 Difference]: Start difference. First operand 1010 states and 2677 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:02,016 INFO L93 Difference]: Finished difference Result 1387 states and 3443 transitions. [2021-03-10 21:09:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:09:02,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:09:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:02,019 INFO L225 Difference]: With dead ends: 1387 [2021-03-10 21:09:02,019 INFO L226 Difference]: Without dead ends: 1373 [2021-03-10 21:09:02,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-03-10 21:09:02,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1053. [2021-03-10 21:09:02,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.634980988593156) internal successors, (2772), 1052 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2772 transitions. [2021-03-10 21:09:02,039 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2772 transitions. Word has length 23 [2021-03-10 21:09:02,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:02,039 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 2772 transitions. [2021-03-10 21:09:02,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2772 transitions. [2021-03-10 21:09:02,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:09:02,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:02,040 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:02,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 21:09:02,251 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash -56471083, now seen corresponding path program 3 times [2021-03-10 21:09:02,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:02,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108604182] [2021-03-10 21:09:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:02,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108604182] [2021-03-10 21:09:02,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:09:02,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:09:02,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38342613] [2021-03-10 21:09:02,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:09:02,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:09:02,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:02,291 INFO L87 Difference]: Start difference. First operand 1053 states and 2772 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:02,341 INFO L93 Difference]: Finished difference Result 1076 states and 2741 transitions. [2021-03-10 21:09:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:09:02,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:09:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:02,343 INFO L225 Difference]: With dead ends: 1076 [2021-03-10 21:09:02,343 INFO L226 Difference]: Without dead ends: 1034 [2021-03-10 21:09:02,343 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-03-10 21:09:02,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 994. [2021-03-10 21:09:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 2.5891238670694863) internal successors, (2571), 993 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2571 transitions. [2021-03-10 21:09:02,355 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2571 transitions. Word has length 23 [2021-03-10 21:09:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:02,355 INFO L480 AbstractCegarLoop]: Abstraction has 994 states and 2571 transitions. [2021-03-10 21:09:02,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2571 transitions. [2021-03-10 21:09:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:09:02,356 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:02,356 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:02,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-03-10 21:09:02,356 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash -670007263, now seen corresponding path program 4 times [2021-03-10 21:09:02,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:02,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340439233] [2021-03-10 21:09:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:02,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340439233] [2021-03-10 21:09:02,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904691005] [2021-03-10 21:09:02,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:02,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:02,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:02,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:02,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:02,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:02,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 21:09:02,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757769889] [2021-03-10 21:09:02,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:09:02,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:02,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:09:02,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:02,458 INFO L87 Difference]: Start difference. First operand 994 states and 2571 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:02,506 INFO L93 Difference]: Finished difference Result 1125 states and 2825 transitions. [2021-03-10 21:09:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:02,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:09:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:02,508 INFO L225 Difference]: With dead ends: 1125 [2021-03-10 21:09:02,508 INFO L226 Difference]: Without dead ends: 1119 [2021-03-10 21:09:02,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:02,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-03-10 21:09:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1007. [2021-03-10 21:09:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 2.5874751491053676) internal successors, (2603), 1006 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 2603 transitions. [2021-03-10 21:09:02,524 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 2603 transitions. Word has length 23 [2021-03-10 21:09:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:02,525 INFO L480 AbstractCegarLoop]: Abstraction has 1007 states and 2603 transitions. [2021-03-10 21:09:02,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 2603 transitions. [2021-03-10 21:09:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:09:02,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:02,526 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:02,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:02,739 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:02,739 INFO L82 PathProgramCache]: Analyzing trace with hash -819089257, now seen corresponding path program 16 times [2021-03-10 21:09:02,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:02,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293564327] [2021-03-10 21:09:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:02,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293564327] [2021-03-10 21:09:02,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988420148] [2021-03-10 21:09:02,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:02,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:02,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:02,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:02,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:02,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:02,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 21:09:02,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524664911] [2021-03-10 21:09:02,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:09:02,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:02,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:09:02,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:02,825 INFO L87 Difference]: Start difference. First operand 1007 states and 2603 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:02,872 INFO L93 Difference]: Finished difference Result 1438 states and 3685 transitions. [2021-03-10 21:09:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:09:02,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:09:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:02,874 INFO L225 Difference]: With dead ends: 1438 [2021-03-10 21:09:02,874 INFO L226 Difference]: Without dead ends: 1425 [2021-03-10 21:09:02,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-03-10 21:09:02,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1280. [2021-03-10 21:09:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 2.639562157935887) internal successors, (3376), 1279 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3376 transitions. [2021-03-10 21:09:02,890 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3376 transitions. Word has length 23 [2021-03-10 21:09:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:02,890 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 3376 transitions. [2021-03-10 21:09:02,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3376 transitions. [2021-03-10 21:09:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:09:02,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:02,892 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:03,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 21:09:03,107 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1471910071, now seen corresponding path program 5 times [2021-03-10 21:09:03,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:03,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208427020] [2021-03-10 21:09:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:03,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208427020] [2021-03-10 21:09:03,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922956229] [2021-03-10 21:09:03,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:03,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:09:03,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:03,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:03,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:03,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:03,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:09:03,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935697775] [2021-03-10 21:09:03,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:03,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:03,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:03,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:03,232 INFO L87 Difference]: Start difference. First operand 1280 states and 3376 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:03,453 INFO L93 Difference]: Finished difference Result 1624 states and 4068 transitions. [2021-03-10 21:09:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:09:03,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:09:03,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:03,455 INFO L225 Difference]: With dead ends: 1624 [2021-03-10 21:09:03,455 INFO L226 Difference]: Without dead ends: 1612 [2021-03-10 21:09:03,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:09:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-03-10 21:09:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1217. [2021-03-10 21:09:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.632401315789474) internal successors, (3201), 1216 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3201 transitions. [2021-03-10 21:09:03,471 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3201 transitions. Word has length 23 [2021-03-10 21:09:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:03,471 INFO L480 AbstractCegarLoop]: Abstraction has 1217 states and 3201 transitions. [2021-03-10 21:09:03,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3201 transitions. [2021-03-10 21:09:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:09:03,472 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:03,472 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:03,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:03,680 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:03,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1618050889, now seen corresponding path program 4 times [2021-03-10 21:09:03,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:03,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900995927] [2021-03-10 21:09:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:03,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900995927] [2021-03-10 21:09:03,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477209377] [2021-03-10 21:09:03,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:03,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:03,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:03,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:03,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:03,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:03,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:09:03,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145949596] [2021-03-10 21:09:03,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:03,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:03,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:03,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:03,808 INFO L87 Difference]: Start difference. First operand 1217 states and 3201 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:03,920 INFO L93 Difference]: Finished difference Result 1486 states and 3771 transitions. [2021-03-10 21:09:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:03,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:09:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:03,922 INFO L225 Difference]: With dead ends: 1486 [2021-03-10 21:09:03,922 INFO L226 Difference]: Without dead ends: 1417 [2021-03-10 21:09:03,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-03-10 21:09:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1004. [2021-03-10 21:09:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 2.5912263210368893) internal successors, (2599), 1003 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 2599 transitions. [2021-03-10 21:09:03,935 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 2599 transitions. Word has length 23 [2021-03-10 21:09:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:03,935 INFO L480 AbstractCegarLoop]: Abstraction has 1004 states and 2599 transitions. [2021-03-10 21:09:03,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 2599 transitions. [2021-03-10 21:09:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:03,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:03,937 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:04,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 21:09:04,151 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2131794949, now seen corresponding path program 17 times [2021-03-10 21:09:04,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:04,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932933319] [2021-03-10 21:09:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:04,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932933319] [2021-03-10 21:09:04,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138277429] [2021-03-10 21:09:04,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:04,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:09:04,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:04,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:04,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:04,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:04,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-03-10 21:09:04,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121994528] [2021-03-10 21:09:04,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:09:04,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:04,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:09:04,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:04,281 INFO L87 Difference]: Start difference. First operand 1004 states and 2599 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:04,474 INFO L93 Difference]: Finished difference Result 1533 states and 3634 transitions. [2021-03-10 21:09:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:09:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:04,477 INFO L225 Difference]: With dead ends: 1533 [2021-03-10 21:09:04,477 INFO L226 Difference]: Without dead ends: 1533 [2021-03-10 21:09:04,477 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:09:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-03-10 21:09:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1062. [2021-03-10 21:09:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 2.5721017907634307) internal successors, (2729), 1061 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 2729 transitions. [2021-03-10 21:09:04,490 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 2729 transitions. Word has length 26 [2021-03-10 21:09:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:04,490 INFO L480 AbstractCegarLoop]: Abstraction has 1062 states and 2729 transitions. [2021-03-10 21:09:04,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 2729 transitions. [2021-03-10 21:09:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:04,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:04,492 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:04,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:09:04,707 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:04,707 INFO L82 PathProgramCache]: Analyzing trace with hash 761307032, now seen corresponding path program 18 times [2021-03-10 21:09:04,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:04,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473644237] [2021-03-10 21:09:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:04,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473644237] [2021-03-10 21:09:04,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601858655] [2021-03-10 21:09:04,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:04,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:09:04,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:04,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:04,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:04,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:04,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-03-10 21:09:04,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948553943] [2021-03-10 21:09:04,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:04,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:04,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:04,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:04,807 INFO L87 Difference]: Start difference. First operand 1062 states and 2729 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:04,888 INFO L93 Difference]: Finished difference Result 1730 states and 4153 transitions. [2021-03-10 21:09:04,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:04,891 INFO L225 Difference]: With dead ends: 1730 [2021-03-10 21:09:04,891 INFO L226 Difference]: Without dead ends: 1710 [2021-03-10 21:09:04,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-03-10 21:09:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1164. [2021-03-10 21:09:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 2.6061908856405847) internal successors, (3031), 1163 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3031 transitions. [2021-03-10 21:09:04,906 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3031 transitions. Word has length 26 [2021-03-10 21:09:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:04,906 INFO L480 AbstractCegarLoop]: Abstraction has 1164 states and 3031 transitions. [2021-03-10 21:09:04,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3031 transitions. [2021-03-10 21:09:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:04,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:04,907 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:05,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-10 21:09:05,122 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:05,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:05,122 INFO L82 PathProgramCache]: Analyzing trace with hash -195885608, now seen corresponding path program 19 times [2021-03-10 21:09:05,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:05,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064024435] [2021-03-10 21:09:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:05,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064024435] [2021-03-10 21:09:05,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785567553] [2021-03-10 21:09:05,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:05,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:05,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:05,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-03-10 21:09:05,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268714469] [2021-03-10 21:09:05,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:05,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:05,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:05,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:05,216 INFO L87 Difference]: Start difference. First operand 1164 states and 3031 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:05,307 INFO L93 Difference]: Finished difference Result 1601 states and 3880 transitions. [2021-03-10 21:09:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:05,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:05,325 INFO L225 Difference]: With dead ends: 1601 [2021-03-10 21:09:05,325 INFO L226 Difference]: Without dead ends: 1601 [2021-03-10 21:09:05,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:05,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-03-10 21:09:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1098. [2021-03-10 21:09:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 2.5660893345487694) internal successors, (2815), 1097 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2815 transitions. [2021-03-10 21:09:05,341 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2815 transitions. Word has length 26 [2021-03-10 21:09:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:05,341 INFO L480 AbstractCegarLoop]: Abstraction has 1098 states and 2815 transitions. [2021-03-10 21:09:05,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2815 transitions. [2021-03-10 21:09:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:05,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:05,342 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:05,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:05,555 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:05,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:05,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1127702055, now seen corresponding path program 20 times [2021-03-10 21:09:05,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:05,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034183284] [2021-03-10 21:09:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:05,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034183284] [2021-03-10 21:09:05,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214041791] [2021-03-10 21:09:05,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:05,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:05,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:05,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:05,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:05,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:05,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 21:09:05,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979015752] [2021-03-10 21:09:05,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:09:05,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:05,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:09:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:05,647 INFO L87 Difference]: Start difference. First operand 1098 states and 2815 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:05,710 INFO L93 Difference]: Finished difference Result 1250 states and 3100 transitions. [2021-03-10 21:09:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:05,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:05,712 INFO L225 Difference]: With dead ends: 1250 [2021-03-10 21:09:05,712 INFO L226 Difference]: Without dead ends: 1247 [2021-03-10 21:09:05,712 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-03-10 21:09:05,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1098. [2021-03-10 21:09:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 2.5651777575205106) internal successors, (2814), 1097 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:05,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2814 transitions. [2021-03-10 21:09:05,725 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2814 transitions. Word has length 26 [2021-03-10 21:09:05,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:05,725 INFO L480 AbstractCegarLoop]: Abstraction has 1098 states and 2814 transitions. [2021-03-10 21:09:05,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:05,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2814 transitions. [2021-03-10 21:09:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:05,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:05,727 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:05,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 21:09:05,931 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:05,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:05,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1111998297, now seen corresponding path program 21 times [2021-03-10 21:09:05,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:05,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127597006] [2021-03-10 21:09:05,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:05,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127597006] [2021-03-10 21:09:05,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700127114] [2021-03-10 21:09:05,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:05,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:09:05,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:05,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:06,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:06,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 21:09:06,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632996782] [2021-03-10 21:09:06,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:09:06,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:06,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:09:06,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:06,021 INFO L87 Difference]: Start difference. First operand 1098 states and 2814 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:06,111 INFO L93 Difference]: Finished difference Result 1540 states and 3748 transitions. [2021-03-10 21:09:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:06,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:06,113 INFO L225 Difference]: With dead ends: 1540 [2021-03-10 21:09:06,113 INFO L226 Difference]: Without dead ends: 1540 [2021-03-10 21:09:06,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:06,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-03-10 21:09:06,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1167. [2021-03-10 21:09:06,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.5874785591766725) internal successors, (3017), 1166 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3017 transitions. [2021-03-10 21:09:06,127 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3017 transitions. Word has length 26 [2021-03-10 21:09:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:06,127 INFO L480 AbstractCegarLoop]: Abstraction has 1167 states and 3017 transitions. [2021-03-10 21:09:06,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3017 transitions. [2021-03-10 21:09:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:06,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:06,128 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:06,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:06,335 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1689374502, now seen corresponding path program 22 times [2021-03-10 21:09:06,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:06,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8458824] [2021-03-10 21:09:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:06,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8458824] [2021-03-10 21:09:06,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189003796] [2021-03-10 21:09:06,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:06,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:06,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:06,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:06,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:06,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:06,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-03-10 21:09:06,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158026497] [2021-03-10 21:09:06,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:06,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:06,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:06,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:06,413 INFO L87 Difference]: Start difference. First operand 1167 states and 3017 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:06,515 INFO L93 Difference]: Finished difference Result 1574 states and 3878 transitions. [2021-03-10 21:09:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:06,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:06,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:06,517 INFO L225 Difference]: With dead ends: 1574 [2021-03-10 21:09:06,517 INFO L226 Difference]: Without dead ends: 1572 [2021-03-10 21:09:06,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-03-10 21:09:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1231. [2021-03-10 21:09:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.608130081300813) internal successors, (3208), 1230 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3208 transitions. [2021-03-10 21:09:06,532 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3208 transitions. Word has length 26 [2021-03-10 21:09:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:06,532 INFO L480 AbstractCegarLoop]: Abstraction has 1231 states and 3208 transitions. [2021-03-10 21:09:06,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3208 transitions. [2021-03-10 21:09:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:06,534 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:06,534 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:06,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 21:09:06,747 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:06,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:06,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1983712384, now seen corresponding path program 23 times [2021-03-10 21:09:06,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:06,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18310169] [2021-03-10 21:09:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:06,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18310169] [2021-03-10 21:09:06,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463062498] [2021-03-10 21:09:06,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:06,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:09:06,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:06,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:06,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:06,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:06,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-03-10 21:09:06,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439453927] [2021-03-10 21:09:06,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:06,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:06,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:06,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:06,836 INFO L87 Difference]: Start difference. First operand 1231 states and 3208 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:06,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:06,949 INFO L93 Difference]: Finished difference Result 1695 states and 4127 transitions. [2021-03-10 21:09:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:06,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:06,951 INFO L225 Difference]: With dead ends: 1695 [2021-03-10 21:09:06,951 INFO L226 Difference]: Without dead ends: 1695 [2021-03-10 21:09:06,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-03-10 21:09:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1239. [2021-03-10 21:09:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 2.6066235864297256) internal successors, (3227), 1238 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3227 transitions. [2021-03-10 21:09:06,966 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3227 transitions. Word has length 26 [2021-03-10 21:09:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:06,966 INFO L480 AbstractCegarLoop]: Abstraction has 1239 states and 3227 transitions. [2021-03-10 21:09:06,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3227 transitions. [2021-03-10 21:09:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:06,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:06,968 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:07,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 21:09:07,182 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1051895937, now seen corresponding path program 24 times [2021-03-10 21:09:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:07,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790353149] [2021-03-10 21:09:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:07,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790353149] [2021-03-10 21:09:07,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602327979] [2021-03-10 21:09:07,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:07,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:09:07,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:07,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:07,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:07,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:07,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 21:09:07,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444305212] [2021-03-10 21:09:07,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:09:07,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:07,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:09:07,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:07,259 INFO L87 Difference]: Start difference. First operand 1239 states and 3227 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:07,348 INFO L93 Difference]: Finished difference Result 1555 states and 3822 transitions. [2021-03-10 21:09:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:07,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:07,350 INFO L225 Difference]: With dead ends: 1555 [2021-03-10 21:09:07,350 INFO L226 Difference]: Without dead ends: 1549 [2021-03-10 21:09:07,350 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2021-03-10 21:09:07,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1177. [2021-03-10 21:09:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.578231292517007) internal successors, (3032), 1176 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3032 transitions. [2021-03-10 21:09:07,364 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3032 transitions. Word has length 26 [2021-03-10 21:09:07,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:07,364 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 3032 transitions. [2021-03-10 21:09:07,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3032 transitions. [2021-03-10 21:09:07,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:07,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:07,365 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:07,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:07,580 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:07,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:07,580 INFO L82 PathProgramCache]: Analyzing trace with hash 346139928, now seen corresponding path program 25 times [2021-03-10 21:09:07,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:07,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804615848] [2021-03-10 21:09:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:07,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804615848] [2021-03-10 21:09:07,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138720926] [2021-03-10 21:09:07,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:07,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:07,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:07,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:07,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-03-10 21:09:07,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351741599] [2021-03-10 21:09:07,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:07,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:07,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:07,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:07,665 INFO L87 Difference]: Start difference. First operand 1177 states and 3032 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:07,768 INFO L93 Difference]: Finished difference Result 1568 states and 3774 transitions. [2021-03-10 21:09:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:07,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:07,769 INFO L225 Difference]: With dead ends: 1568 [2021-03-10 21:09:07,770 INFO L226 Difference]: Without dead ends: 1568 [2021-03-10 21:09:07,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-03-10 21:09:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1057. [2021-03-10 21:09:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.5426136363636362) internal successors, (2685), 1056 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2685 transitions. [2021-03-10 21:09:07,781 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2685 transitions. Word has length 26 [2021-03-10 21:09:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:07,781 INFO L480 AbstractCegarLoop]: Abstraction has 1057 states and 2685 transitions. [2021-03-10 21:09:07,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2685 transitions. [2021-03-10 21:09:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:07,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:07,783 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:07,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-03-10 21:09:07,997 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1258958503, now seen corresponding path program 26 times [2021-03-10 21:09:07,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:07,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966398583] [2021-03-10 21:09:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:08,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966398583] [2021-03-10 21:09:08,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682389100] [2021-03-10 21:09:08,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:08,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:08,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:08,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:08,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:08,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:08,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:09:08,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747101388] [2021-03-10 21:09:08,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:08,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:08,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:08,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:08,101 INFO L87 Difference]: Start difference. First operand 1057 states and 2685 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:08,212 INFO L93 Difference]: Finished difference Result 1294 states and 3138 transitions. [2021-03-10 21:09:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:08,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:08,214 INFO L225 Difference]: With dead ends: 1294 [2021-03-10 21:09:08,214 INFO L226 Difference]: Without dead ends: 1282 [2021-03-10 21:09:08,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-03-10 21:09:08,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1066. [2021-03-10 21:09:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 2.5380281690140847) internal successors, (2703), 1065 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 2703 transitions. [2021-03-10 21:09:08,225 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 2703 transitions. Word has length 26 [2021-03-10 21:09:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:08,227 INFO L480 AbstractCegarLoop]: Abstraction has 1066 states and 2703 transitions. [2021-03-10 21:09:08,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 2703 transitions. [2021-03-10 21:09:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:08,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:08,229 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:08,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:08,443 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:08,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1264613717, now seen corresponding path program 27 times [2021-03-10 21:09:08,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:08,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632531261] [2021-03-10 21:09:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:08,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632531261] [2021-03-10 21:09:08,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515063635] [2021-03-10 21:09:08,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:08,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:09:08,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:08,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:08,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:08,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:08,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 14 [2021-03-10 21:09:08,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884880556] [2021-03-10 21:09:08,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:09:08,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:09:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:08,623 INFO L87 Difference]: Start difference. First operand 1066 states and 2703 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:09,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:09,106 INFO L93 Difference]: Finished difference Result 1521 states and 3549 transitions. [2021-03-10 21:09:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:09:09,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:09,108 INFO L225 Difference]: With dead ends: 1521 [2021-03-10 21:09:09,108 INFO L226 Difference]: Without dead ends: 1507 [2021-03-10 21:09:09,109 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 395.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:09:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-03-10 21:09:09,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 865. [2021-03-10 21:09:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.4583333333333335) internal successors, (2124), 864 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2124 transitions. [2021-03-10 21:09:09,119 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2124 transitions. Word has length 26 [2021-03-10 21:09:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:09,119 INFO L480 AbstractCegarLoop]: Abstraction has 865 states and 2124 transitions. [2021-03-10 21:09:09,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2124 transitions. [2021-03-10 21:09:09,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:09,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:09,120 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:09,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 21:09:09,321 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:09,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2036715645, now seen corresponding path program 28 times [2021-03-10 21:09:09,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:09,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811165329] [2021-03-10 21:09:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:09,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811165329] [2021-03-10 21:09:09,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217084099] [2021-03-10 21:09:09,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:09,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:09,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:09,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:09,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:09,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:09,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 21:09:09,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066194897] [2021-03-10 21:09:09,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:09:09,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:09,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:09:09,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:09,404 INFO L87 Difference]: Start difference. First operand 865 states and 2124 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:09,478 INFO L93 Difference]: Finished difference Result 1241 states and 2905 transitions. [2021-03-10 21:09:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:09,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:09,479 INFO L225 Difference]: With dead ends: 1241 [2021-03-10 21:09:09,479 INFO L226 Difference]: Without dead ends: 1241 [2021-03-10 21:09:09,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-03-10 21:09:09,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 893. [2021-03-10 21:09:09,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.4809417040358746) internal successors, (2213), 892 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2213 transitions. [2021-03-10 21:09:09,489 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2213 transitions. Word has length 26 [2021-03-10 21:09:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:09,489 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 2213 transitions. [2021-03-10 21:09:09,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2213 transitions. [2021-03-10 21:09:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:09,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:09,490 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:09,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-10 21:09:09,703 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:09,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1200084132, now seen corresponding path program 29 times [2021-03-10 21:09:09,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:09,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889754212] [2021-03-10 21:09:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:09,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889754212] [2021-03-10 21:09:09,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943004656] [2021-03-10 21:09:09,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:09,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:09:09,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:09,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:09,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:09,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:09,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-03-10 21:09:09,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422605819] [2021-03-10 21:09:09,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:09,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:09,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:09,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:09,809 INFO L87 Difference]: Start difference. First operand 893 states and 2213 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:09,917 INFO L93 Difference]: Finished difference Result 1410 states and 3303 transitions. [2021-03-10 21:09:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:09:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:09,919 INFO L225 Difference]: With dead ends: 1410 [2021-03-10 21:09:09,919 INFO L226 Difference]: Without dead ends: 1410 [2021-03-10 21:09:09,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-03-10 21:09:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 977. [2021-03-10 21:09:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.507172131147541) internal successors, (2447), 976 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2447 transitions. [2021-03-10 21:09:09,929 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2447 transitions. Word has length 26 [2021-03-10 21:09:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:09,930 INFO L480 AbstractCegarLoop]: Abstraction has 977 states and 2447 transitions. [2021-03-10 21:09:09,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2447 transitions. [2021-03-10 21:09:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:09,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:09,931 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:10,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:10,145 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:10,146 INFO L82 PathProgramCache]: Analyzing trace with hash 127178589, now seen corresponding path program 30 times [2021-03-10 21:09:10,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:10,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555765266] [2021-03-10 21:09:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:10,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555765266] [2021-03-10 21:09:10,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580442849] [2021-03-10 21:09:10,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:10,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:09:10,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:10,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:10,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:10,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 21:09:10,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631831570] [2021-03-10 21:09:10,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:09:10,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:10,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:09:10,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:10,224 INFO L87 Difference]: Start difference. First operand 977 states and 2447 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:10,272 INFO L93 Difference]: Finished difference Result 1318 states and 3120 transitions. [2021-03-10 21:09:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:09:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:10,273 INFO L225 Difference]: With dead ends: 1318 [2021-03-10 21:09:10,273 INFO L226 Difference]: Without dead ends: 1315 [2021-03-10 21:09:10,273 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-03-10 21:09:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 977. [2021-03-10 21:09:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.5061475409836067) internal successors, (2446), 976 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2446 transitions. [2021-03-10 21:09:10,284 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2446 transitions. Word has length 26 [2021-03-10 21:09:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:10,284 INFO L480 AbstractCegarLoop]: Abstraction has 977 states and 2446 transitions. [2021-03-10 21:09:10,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2446 transitions. [2021-03-10 21:09:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:10,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:10,285 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:10,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:10,485 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1457310708, now seen corresponding path program 31 times [2021-03-10 21:09:10,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:10,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309635584] [2021-03-10 21:09:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:10,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309635584] [2021-03-10 21:09:10,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164216] [2021-03-10 21:09:10,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:10,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:10,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:10,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-03-10 21:09:10,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282328023] [2021-03-10 21:09:10,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:10,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:10,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:10,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:10,570 INFO L87 Difference]: Start difference. First operand 977 states and 2446 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:10,714 INFO L93 Difference]: Finished difference Result 1449 states and 3401 transitions. [2021-03-10 21:09:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:10,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:10,716 INFO L225 Difference]: With dead ends: 1449 [2021-03-10 21:09:10,716 INFO L226 Difference]: Without dead ends: 1449 [2021-03-10 21:09:10,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-03-10 21:09:10,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1002. [2021-03-10 21:09:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 2.5134865134865136) internal successors, (2516), 1001 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 2516 transitions. [2021-03-10 21:09:10,727 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 2516 transitions. Word has length 26 [2021-03-10 21:09:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:10,727 INFO L480 AbstractCegarLoop]: Abstraction has 1002 states and 2516 transitions. [2021-03-10 21:09:10,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:10,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 2516 transitions. [2021-03-10 21:09:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:10,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:10,728 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:10,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:10,943 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:10,943 INFO L82 PathProgramCache]: Analyzing trace with hash 334241155, now seen corresponding path program 32 times [2021-03-10 21:09:10,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:10,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139378820] [2021-03-10 21:09:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:10,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139378820] [2021-03-10 21:09:10,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233231183] [2021-03-10 21:09:10,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:10,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:10,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:10,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:11,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:11,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 21:09:11,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222729813] [2021-03-10 21:09:11,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:11,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:11,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:11,023 INFO L87 Difference]: Start difference. First operand 1002 states and 2516 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:11,088 INFO L93 Difference]: Finished difference Result 1406 states and 3307 transitions. [2021-03-10 21:09:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:11,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:11,090 INFO L225 Difference]: With dead ends: 1406 [2021-03-10 21:09:11,090 INFO L226 Difference]: Without dead ends: 1394 [2021-03-10 21:09:11,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-03-10 21:09:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1002. [2021-03-10 21:09:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 2.5104895104895104) internal successors, (2513), 1001 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 2513 transitions. [2021-03-10 21:09:11,100 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 2513 transitions. Word has length 26 [2021-03-10 21:09:11,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:11,100 INFO L480 AbstractCegarLoop]: Abstraction has 1002 states and 2513 transitions. [2021-03-10 21:09:11,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 2513 transitions. [2021-03-10 21:09:11,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:11,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:11,101 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:11,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-10 21:09:11,302 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:11,302 INFO L82 PathProgramCache]: Analyzing trace with hash -232684456, now seen corresponding path program 33 times [2021-03-10 21:09:11,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:11,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917897932] [2021-03-10 21:09:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917897932] [2021-03-10 21:09:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67051029] [2021-03-10 21:09:11,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:11,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:09:11,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:11,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:11,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-03-10 21:09:11,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916030091] [2021-03-10 21:09:11,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:09:11,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:09:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:09:11,472 INFO L87 Difference]: Start difference. First operand 1002 states and 2513 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:11,961 INFO L93 Difference]: Finished difference Result 1583 states and 3654 transitions. [2021-03-10 21:09:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:09:11,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:11,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:11,963 INFO L225 Difference]: With dead ends: 1583 [2021-03-10 21:09:11,963 INFO L226 Difference]: Without dead ends: 1564 [2021-03-10 21:09:11,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=299, Invalid=961, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:09:11,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-03-10 21:09:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 947. [2021-03-10 21:09:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.463002114164905) internal successors, (2330), 946 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2330 transitions. [2021-03-10 21:09:11,983 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2330 transitions. Word has length 26 [2021-03-10 21:09:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:11,983 INFO L480 AbstractCegarLoop]: Abstraction has 947 states and 2330 transitions. [2021-03-10 21:09:11,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2330 transitions. [2021-03-10 21:09:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:09:11,984 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:11,984 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:12,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:12,187 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:12,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:12,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1947181405, now seen corresponding path program 34 times [2021-03-10 21:09:12,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:12,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035899655] [2021-03-10 21:09:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:12,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035899655] [2021-03-10 21:09:12,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408601596] [2021-03-10 21:09:12,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:12,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:12,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:12,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:12,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:12,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:12,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 21:09:12,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894082102] [2021-03-10 21:09:12,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:12,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:12,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:12,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:12,278 INFO L87 Difference]: Start difference. First operand 947 states and 2330 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:12,364 INFO L93 Difference]: Finished difference Result 1283 states and 2992 transitions. [2021-03-10 21:09:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:12,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:09:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:12,365 INFO L225 Difference]: With dead ends: 1283 [2021-03-10 21:09:12,365 INFO L226 Difference]: Without dead ends: 1260 [2021-03-10 21:09:12,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-03-10 21:09:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 980. [2021-03-10 21:09:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.4443309499489274) internal successors, (2393), 979 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2393 transitions. [2021-03-10 21:09:12,374 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2393 transitions. Word has length 26 [2021-03-10 21:09:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:12,374 INFO L480 AbstractCegarLoop]: Abstraction has 980 states and 2393 transitions. [2021-03-10 21:09:12,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2393 transitions. [2021-03-10 21:09:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:12,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:12,376 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:12,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:12,589 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:12,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1692037720, now seen corresponding path program 5 times [2021-03-10 21:09:12,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:12,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402709546] [2021-03-10 21:09:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:12,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402709546] [2021-03-10 21:09:12,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846730788] [2021-03-10 21:09:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:12,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:09:12,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:12,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:12,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:09:12,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511075991] [2021-03-10 21:09:12,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:12,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:12,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:12,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:12,687 INFO L87 Difference]: Start difference. First operand 980 states and 2393 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:12,873 INFO L93 Difference]: Finished difference Result 1505 states and 3422 transitions. [2021-03-10 21:09:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:12,874 INFO L225 Difference]: With dead ends: 1505 [2021-03-10 21:09:12,874 INFO L226 Difference]: Without dead ends: 1447 [2021-03-10 21:09:12,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:09:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-03-10 21:09:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 927. [2021-03-10 21:09:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 2.4211663066954645) internal successors, (2242), 926 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2242 transitions. [2021-03-10 21:09:12,883 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2242 transitions. Word has length 29 [2021-03-10 21:09:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:12,884 INFO L480 AbstractCegarLoop]: Abstraction has 927 states and 2242 transitions. [2021-03-10 21:09:12,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2242 transitions. [2021-03-10 21:09:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:12,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:12,885 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:13,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:13,090 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:13,090 INFO L82 PathProgramCache]: Analyzing trace with hash 328852904, now seen corresponding path program 6 times [2021-03-10 21:09:13,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:13,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112462534] [2021-03-10 21:09:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:13,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112462534] [2021-03-10 21:09:13,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961845799] [2021-03-10 21:09:13,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:13,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:09:13,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:13,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:09:13,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:13,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:09:13,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:09:13,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:13,263 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-03-10 21:09:13,263 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:09:13,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:13,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-03-10 21:09:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:13,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:13,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:09:13,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927234678] [2021-03-10 21:09:13,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:13,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:13,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:13,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:13,268 INFO L87 Difference]: Start difference. First operand 927 states and 2242 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:13,447 INFO L93 Difference]: Finished difference Result 1021 states and 2382 transitions. [2021-03-10 21:09:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:13,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:13,448 INFO L225 Difference]: With dead ends: 1021 [2021-03-10 21:09:13,448 INFO L226 Difference]: Without dead ends: 969 [2021-03-10 21:09:13,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-03-10 21:09:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 878. [2021-03-10 21:09:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.418472063854048) internal successors, (2121), 877 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2121 transitions. [2021-03-10 21:09:13,456 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2121 transitions. Word has length 29 [2021-03-10 21:09:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:13,456 INFO L480 AbstractCegarLoop]: Abstraction has 878 states and 2121 transitions. [2021-03-10 21:09:13,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2121 transitions. [2021-03-10 21:09:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:13,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:13,457 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:13,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:13,658 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash -114875864, now seen corresponding path program 7 times [2021-03-10 21:09:13,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:13,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464043230] [2021-03-10 21:09:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:13,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464043230] [2021-03-10 21:09:13,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298297004] [2021-03-10 21:09:13,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:13,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:13,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:13,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:13,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:09:13,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599837840] [2021-03-10 21:09:13,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:13,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:13,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:13,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:13,766 INFO L87 Difference]: Start difference. First operand 878 states and 2121 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:13,839 INFO L93 Difference]: Finished difference Result 1004 states and 2363 transitions. [2021-03-10 21:09:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:13,840 INFO L225 Difference]: With dead ends: 1004 [2021-03-10 21:09:13,840 INFO L226 Difference]: Without dead ends: 1004 [2021-03-10 21:09:13,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-03-10 21:09:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 884. [2021-03-10 21:09:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.420158550396376) internal successors, (2137), 883 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2137 transitions. [2021-03-10 21:09:13,848 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2137 transitions. Word has length 29 [2021-03-10 21:09:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:13,848 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2137 transitions. [2021-03-10 21:09:13,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2137 transitions. [2021-03-10 21:09:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:13,849 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:13,849 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:14,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-03-10 21:09:14,049 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:14,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:14,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1244519733, now seen corresponding path program 6 times [2021-03-10 21:09:14,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:14,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931550966] [2021-03-10 21:09:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:14,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931550966] [2021-03-10 21:09:14,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432505078] [2021-03-10 21:09:14,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:14,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:09:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:09:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:14,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:14,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-03-10 21:09:14,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989980485] [2021-03-10 21:09:14,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:14,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:14,157 INFO L87 Difference]: Start difference. First operand 884 states and 2137 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:14,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:14,252 INFO L93 Difference]: Finished difference Result 1254 states and 2896 transitions. [2021-03-10 21:09:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:14,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:14,253 INFO L225 Difference]: With dead ends: 1254 [2021-03-10 21:09:14,253 INFO L226 Difference]: Without dead ends: 1226 [2021-03-10 21:09:14,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-03-10 21:09:14,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 886. [2021-03-10 21:09:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.4112994350282486) internal successors, (2134), 885 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2134 transitions. [2021-03-10 21:09:14,262 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2134 transitions. Word has length 29 [2021-03-10 21:09:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:14,262 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 2134 transitions. [2021-03-10 21:09:14,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2134 transitions. [2021-03-10 21:09:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:14,263 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:14,263 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:14,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:14,475 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:14,476 INFO L82 PathProgramCache]: Analyzing trace with hash 753499772, now seen corresponding path program 35 times [2021-03-10 21:09:14,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:14,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053093501] [2021-03-10 21:09:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:14,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053093501] [2021-03-10 21:09:14,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322113616] [2021-03-10 21:09:14,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:14,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:09:14,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:14,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:09:14,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:14,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:14,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 21:09:14,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082103964] [2021-03-10 21:09:14,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:09:14,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:14,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:09:14,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:14,560 INFO L87 Difference]: Start difference. First operand 886 states and 2134 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:14,639 INFO L93 Difference]: Finished difference Result 1454 states and 3465 transitions. [2021-03-10 21:09:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:09:14,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:14,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:14,641 INFO L225 Difference]: With dead ends: 1454 [2021-03-10 21:09:14,641 INFO L226 Difference]: Without dead ends: 1419 [2021-03-10 21:09:14,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-03-10 21:09:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1059. [2021-03-10 21:09:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 2.4706994328922494) internal successors, (2614), 1058 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 2614 transitions. [2021-03-10 21:09:14,650 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 2614 transitions. Word has length 29 [2021-03-10 21:09:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:14,651 INFO L480 AbstractCegarLoop]: Abstraction has 1059 states and 2614 transitions. [2021-03-10 21:09:14,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 2614 transitions. [2021-03-10 21:09:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:14,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:14,652 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:14,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 21:09:14,866 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1336556998, now seen corresponding path program 7 times [2021-03-10 21:09:14,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:14,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361424153] [2021-03-10 21:09:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:14,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361424153] [2021-03-10 21:09:14,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199743202] [2021-03-10 21:09:14,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:14,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:14,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:14,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:14,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:09:14,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155737557] [2021-03-10 21:09:14,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:14,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:14,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:14,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:14,960 INFO L87 Difference]: Start difference. First operand 1059 states and 2614 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:15,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:15,055 INFO L93 Difference]: Finished difference Result 1467 states and 3461 transitions. [2021-03-10 21:09:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:15,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:15,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:15,057 INFO L225 Difference]: With dead ends: 1467 [2021-03-10 21:09:15,057 INFO L226 Difference]: Without dead ends: 1448 [2021-03-10 21:09:15,057 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-03-10 21:09:15,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1122. [2021-03-10 21:09:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.463871543264942) internal successors, (2762), 1121 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2762 transitions. [2021-03-10 21:09:15,067 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2762 transitions. Word has length 29 [2021-03-10 21:09:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:15,067 INFO L480 AbstractCegarLoop]: Abstraction has 1122 states and 2762 transitions. [2021-03-10 21:09:15,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2762 transitions. [2021-03-10 21:09:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:15,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:15,069 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:15,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 21:09:15,269 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1458077306, now seen corresponding path program 8 times [2021-03-10 21:09:15,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:15,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298117516] [2021-03-10 21:09:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:15,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298117516] [2021-03-10 21:09:15,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435159997] [2021-03-10 21:09:15,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:15,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:15,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:15,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:15,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:15,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:15,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:09:15,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190506887] [2021-03-10 21:09:15,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:15,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:15,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:15,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:15,387 INFO L87 Difference]: Start difference. First operand 1122 states and 2762 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:15,508 INFO L93 Difference]: Finished difference Result 1377 states and 3234 transitions. [2021-03-10 21:09:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:15,509 INFO L225 Difference]: With dead ends: 1377 [2021-03-10 21:09:15,509 INFO L226 Difference]: Without dead ends: 1337 [2021-03-10 21:09:15,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-03-10 21:09:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1088. [2021-03-10 21:09:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 2.4590616375344987) internal successors, (2673), 1087 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 2673 transitions. [2021-03-10 21:09:15,519 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 2673 transitions. Word has length 29 [2021-03-10 21:09:15,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:15,519 INFO L480 AbstractCegarLoop]: Abstraction has 1088 states and 2673 transitions. [2021-03-10 21:09:15,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 2673 transitions. [2021-03-10 21:09:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:15,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:15,520 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:15,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 21:09:15,721 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2071613486, now seen corresponding path program 9 times [2021-03-10 21:09:15,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:15,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654573494] [2021-03-10 21:09:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:15,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654573494] [2021-03-10 21:09:15,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752522542] [2021-03-10 21:09:15,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:15,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:09:15,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:15,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:15,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:09:15,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972896492] [2021-03-10 21:09:15,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:15,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:15,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:15,822 INFO L87 Difference]: Start difference. First operand 1088 states and 2673 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:15,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:15,908 INFO L93 Difference]: Finished difference Result 1392 states and 3298 transitions. [2021-03-10 21:09:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:15,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:15,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:15,910 INFO L225 Difference]: With dead ends: 1392 [2021-03-10 21:09:15,910 INFO L226 Difference]: Without dead ends: 1365 [2021-03-10 21:09:15,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-03-10 21:09:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1100. [2021-03-10 21:09:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 2.4567788898999092) internal successors, (2700), 1099 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 2700 transitions. [2021-03-10 21:09:15,920 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 2700 transitions. Word has length 29 [2021-03-10 21:09:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:15,920 INFO L480 AbstractCegarLoop]: Abstraction has 1100 states and 2700 transitions. [2021-03-10 21:09:15,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 2700 transitions. [2021-03-10 21:09:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:15,921 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:15,921 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:16,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 21:09:16,122 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:16,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:16,122 INFO L82 PathProgramCache]: Analyzing trace with hash 70303848, now seen corresponding path program 10 times [2021-03-10 21:09:16,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:16,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726613797] [2021-03-10 21:09:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:16,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726613797] [2021-03-10 21:09:16,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537529993] [2021-03-10 21:09:16,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:16,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:16,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:09:16,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:16,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:09:16,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-03-10 21:09:16,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:16,243 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-03-10 21:09:16,243 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:09:16,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:16,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-03-10 21:09:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:16,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:16,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 21:09:16,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664707212] [2021-03-10 21:09:16,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:16,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:16,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:16,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:16,255 INFO L87 Difference]: Start difference. First operand 1100 states and 2700 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:16,444 INFO L93 Difference]: Finished difference Result 2432 states and 5712 transitions. [2021-03-10 21:09:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:09:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:16,447 INFO L225 Difference]: With dead ends: 2432 [2021-03-10 21:09:16,447 INFO L226 Difference]: Without dead ends: 2352 [2021-03-10 21:09:16,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-03-10 21:09:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1458. [2021-03-10 21:09:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.5277968428277284) internal successors, (3683), 1457 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 3683 transitions. [2021-03-10 21:09:16,462 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 3683 transitions. Word has length 29 [2021-03-10 21:09:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:16,462 INFO L480 AbstractCegarLoop]: Abstraction has 1458 states and 3683 transitions. [2021-03-10 21:09:16,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 3683 transitions. [2021-03-10 21:09:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:16,463 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:16,463 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:16,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 21:09:16,664 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:16,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1154021054, now seen corresponding path program 8 times [2021-03-10 21:09:16,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:16,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316443383] [2021-03-10 21:09:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:16,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316443383] [2021-03-10 21:09:16,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858962559] [2021-03-10 21:09:16,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:16,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:16,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:16,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:16,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:16,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:16,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:09:16,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509569604] [2021-03-10 21:09:16,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:16,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:16,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:16,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:16,756 INFO L87 Difference]: Start difference. First operand 1458 states and 3683 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:16,863 INFO L93 Difference]: Finished difference Result 1776 states and 4322 transitions. [2021-03-10 21:09:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:16,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:16,865 INFO L225 Difference]: With dead ends: 1776 [2021-03-10 21:09:16,865 INFO L226 Difference]: Without dead ends: 1772 [2021-03-10 21:09:16,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-03-10 21:09:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1474. [2021-03-10 21:09:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.5274949083503055) internal successors, (3723), 1473 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 3723 transitions. [2021-03-10 21:09:16,878 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 3723 transitions. Word has length 29 [2021-03-10 21:09:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:16,878 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 3723 transitions. [2021-03-10 21:09:16,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 3723 transitions. [2021-03-10 21:09:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:16,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:16,880 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:17,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 21:09:17,080 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:17,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1507649858, now seen corresponding path program 11 times [2021-03-10 21:09:17,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:17,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113777019] [2021-03-10 21:09:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:17,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113777019] [2021-03-10 21:09:17,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976144091] [2021-03-10 21:09:17,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:17,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:09:17,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:17,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:17,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:17,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:09:17,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036741661] [2021-03-10 21:09:17,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:17,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:17,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:17,232 INFO L87 Difference]: Start difference. First operand 1474 states and 3723 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:17,333 INFO L93 Difference]: Finished difference Result 1626 states and 4001 transitions. [2021-03-10 21:09:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:17,335 INFO L225 Difference]: With dead ends: 1626 [2021-03-10 21:09:17,335 INFO L226 Difference]: Without dead ends: 1603 [2021-03-10 21:09:17,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-03-10 21:09:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1461. [2021-03-10 21:09:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 2.5287671232876714) internal successors, (3692), 1460 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 3692 transitions. [2021-03-10 21:09:17,349 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 3692 transitions. Word has length 29 [2021-03-10 21:09:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:17,349 INFO L480 AbstractCegarLoop]: Abstraction has 1461 states and 3692 transitions. [2021-03-10 21:09:17,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 3692 transitions. [2021-03-10 21:09:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:17,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:17,351 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:17,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 21:09:17,566 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:17,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1002279274, now seen corresponding path program 9 times [2021-03-10 21:09:17,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:17,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711634878] [2021-03-10 21:09:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:17,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711634878] [2021-03-10 21:09:17,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979572983] [2021-03-10 21:09:17,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:17,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:09:17,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:17,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:17,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:17,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:17,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:09:17,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110323255] [2021-03-10 21:09:17,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:17,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:17,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:17,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:17,657 INFO L87 Difference]: Start difference. First operand 1461 states and 3692 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:17,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:17,762 INFO L93 Difference]: Finished difference Result 1870 states and 4560 transitions. [2021-03-10 21:09:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:17,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:17,764 INFO L225 Difference]: With dead ends: 1870 [2021-03-10 21:09:17,764 INFO L226 Difference]: Without dead ends: 1860 [2021-03-10 21:09:17,764 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-03-10 21:09:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1540. [2021-03-10 21:09:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.521117608836907) internal successors, (3880), 1539 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 3880 transitions. [2021-03-10 21:09:17,779 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 3880 transitions. Word has length 29 [2021-03-10 21:09:17,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:17,779 INFO L480 AbstractCegarLoop]: Abstraction has 1540 states and 3880 transitions. [2021-03-10 21:09:17,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 3880 transitions. [2021-03-10 21:09:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:17,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:17,781 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:17,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:17,995 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:17,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:17,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1792355030, now seen corresponding path program 12 times [2021-03-10 21:09:17,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:17,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819891840] [2021-03-10 21:09:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:18,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819891840] [2021-03-10 21:09:18,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368222206] [2021-03-10 21:09:18,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:18,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:09:18,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:18,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:18,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:18,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:09:18,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:18,124 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 21:09:18,124 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:09:18,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:18,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-03-10 21:09:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:18,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:18,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-03-10 21:09:18,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70622176] [2021-03-10 21:09:18,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:09:18,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:18,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:09:18,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:18,132 INFO L87 Difference]: Start difference. First operand 1540 states and 3880 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:18,356 INFO L93 Difference]: Finished difference Result 1798 states and 4387 transitions. [2021-03-10 21:09:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:09:18,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:18,357 INFO L225 Difference]: With dead ends: 1798 [2021-03-10 21:09:18,358 INFO L226 Difference]: Without dead ends: 1705 [2021-03-10 21:09:18,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-03-10 21:09:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1545. [2021-03-10 21:09:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 2.5110103626943006) internal successors, (3877), 1544 states have internal predecessors, (3877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:18,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 3877 transitions. [2021-03-10 21:09:18,371 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 3877 transitions. Word has length 29 [2021-03-10 21:09:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:18,372 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 3877 transitions. [2021-03-10 21:09:18,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:18,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 3877 transitions. [2021-03-10 21:09:18,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:18,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:18,373 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:18,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 21:09:18,573 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash -109137342, now seen corresponding path program 13 times [2021-03-10 21:09:18,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:18,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104103092] [2021-03-10 21:09:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:18,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104103092] [2021-03-10 21:09:18,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409976980] [2021-03-10 21:09:18,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:18,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:18,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:18,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:18,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:09:18,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616987937] [2021-03-10 21:09:18,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:18,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:18,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:18,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:18,667 INFO L87 Difference]: Start difference. First operand 1545 states and 3877 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:18,829 INFO L93 Difference]: Finished difference Result 1767 states and 4304 transitions. [2021-03-10 21:09:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:18,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:18,831 INFO L225 Difference]: With dead ends: 1767 [2021-03-10 21:09:18,831 INFO L226 Difference]: Without dead ends: 1740 [2021-03-10 21:09:18,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:09:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-03-10 21:09:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1485. [2021-03-10 21:09:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 2.51078167115903) internal successors, (3726), 1484 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 3726 transitions. [2021-03-10 21:09:18,844 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 3726 transitions. Word has length 29 [2021-03-10 21:09:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:18,844 INFO L480 AbstractCegarLoop]: Abstraction has 1485 states and 3726 transitions. [2021-03-10 21:09:18,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 3726 transitions. [2021-03-10 21:09:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:09:18,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:18,846 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:19,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:19,050 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:19,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:19,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1583760380, now seen corresponding path program 36 times [2021-03-10 21:09:19,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:19,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580127805] [2021-03-10 21:09:19,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:19,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580127805] [2021-03-10 21:09:19,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559064712] [2021-03-10 21:09:19,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:19,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:09:19,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:09:19,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:19,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:19,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 21:09:19,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692271099] [2021-03-10 21:09:19,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:09:19,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:09:19,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:19,142 INFO L87 Difference]: Start difference. First operand 1485 states and 3726 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:19,220 INFO L93 Difference]: Finished difference Result 2087 states and 5110 transitions. [2021-03-10 21:09:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:09:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:09:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:19,222 INFO L225 Difference]: With dead ends: 2087 [2021-03-10 21:09:19,222 INFO L226 Difference]: Without dead ends: 2056 [2021-03-10 21:09:19,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2021-03-10 21:09:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 1745. [2021-03-10 21:09:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 2.5160550458715596) internal successors, (4388), 1744 states have internal predecessors, (4388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 4388 transitions. [2021-03-10 21:09:19,242 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 4388 transitions. Word has length 29 [2021-03-10 21:09:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:19,242 INFO L480 AbstractCegarLoop]: Abstraction has 1745 states and 4388 transitions. [2021-03-10 21:09:19,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 4388 transitions. [2021-03-10 21:09:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:09:19,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:19,245 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:19,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-03-10 21:09:19,459 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1113336248, now seen corresponding path program 14 times [2021-03-10 21:09:19,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:19,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305315227] [2021-03-10 21:09:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:19,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305315227] [2021-03-10 21:09:19,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166818305] [2021-03-10 21:09:19,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:19,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:19,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:19,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:19,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:19,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 13 [2021-03-10 21:09:19,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918305007] [2021-03-10 21:09:19,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:09:19,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:19,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:09:19,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:19,610 INFO L87 Difference]: Start difference. First operand 1745 states and 4388 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:20,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:20,036 INFO L93 Difference]: Finished difference Result 2937 states and 6908 transitions. [2021-03-10 21:09:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:09:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:09:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:20,039 INFO L225 Difference]: With dead ends: 2937 [2021-03-10 21:09:20,039 INFO L226 Difference]: Without dead ends: 2890 [2021-03-10 21:09:20,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:09:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2021-03-10 21:09:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 1984. [2021-03-10 21:09:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 2.503277861825517) internal successors, (4964), 1983 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 4964 transitions. [2021-03-10 21:09:20,061 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 4964 transitions. Word has length 32 [2021-03-10 21:09:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:20,061 INFO L480 AbstractCegarLoop]: Abstraction has 1984 states and 4964 transitions. [2021-03-10 21:09:20,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 4964 transitions. [2021-03-10 21:09:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:09:20,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:20,063 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:20,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:20,277 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:20,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:20,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1537983116, now seen corresponding path program 37 times [2021-03-10 21:09:20,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:20,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532856702] [2021-03-10 21:09:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:20,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532856702] [2021-03-10 21:09:20,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594668974] [2021-03-10 21:09:20,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:20,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:20,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:20,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:20,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 21:09:20,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243215029] [2021-03-10 21:09:20,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:20,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:20,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:20,388 INFO L87 Difference]: Start difference. First operand 1984 states and 4964 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:20,470 INFO L93 Difference]: Finished difference Result 2223 states and 5432 transitions. [2021-03-10 21:09:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:20,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:09:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:20,472 INFO L225 Difference]: With dead ends: 2223 [2021-03-10 21:09:20,472 INFO L226 Difference]: Without dead ends: 2217 [2021-03-10 21:09:20,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-03-10 21:09:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 1967. [2021-03-10 21:09:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 2.496439471007121) internal successors, (4908), 1966 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 4908 transitions. [2021-03-10 21:09:20,489 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 4908 transitions. Word has length 32 [2021-03-10 21:09:20,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:20,489 INFO L480 AbstractCegarLoop]: Abstraction has 1967 states and 4908 transitions. [2021-03-10 21:09:20,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 4908 transitions. [2021-03-10 21:09:20,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:09:20,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:20,491 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:20,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:20,695 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:20,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:20,695 INFO L82 PathProgramCache]: Analyzing trace with hash 727682098, now seen corresponding path program 38 times [2021-03-10 21:09:20,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:20,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464295952] [2021-03-10 21:09:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:20,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464295952] [2021-03-10 21:09:20,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229525322] [2021-03-10 21:09:20,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:20,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:20,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:20,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 21:09:20,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337181026] [2021-03-10 21:09:20,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:20,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:20,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:20,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:20,794 INFO L87 Difference]: Start difference. First operand 1967 states and 4908 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:20,891 INFO L93 Difference]: Finished difference Result 2575 states and 6130 transitions. [2021-03-10 21:09:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:09:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:20,894 INFO L225 Difference]: With dead ends: 2575 [2021-03-10 21:09:20,894 INFO L226 Difference]: Without dead ends: 2545 [2021-03-10 21:09:20,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-03-10 21:09:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2060. [2021-03-10 21:09:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.5046138902379798) internal successors, (5157), 2059 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 5157 transitions. [2021-03-10 21:09:20,913 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 5157 transitions. Word has length 32 [2021-03-10 21:09:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:20,913 INFO L480 AbstractCegarLoop]: Abstraction has 2060 states and 5157 transitions. [2021-03-10 21:09:20,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 5157 transitions. [2021-03-10 21:09:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:09:20,915 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:20,915 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:21,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 21:09:21,119 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash 934744664, now seen corresponding path program 39 times [2021-03-10 21:09:21,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:21,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683790976] [2021-03-10 21:09:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:21,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683790976] [2021-03-10 21:09:21,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792753496] [2021-03-10 21:09:21,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:21,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:09:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:21,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:21,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-03-10 21:09:21,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:21,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:09:21,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157900368] [2021-03-10 21:09:21,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:09:21,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:21,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:09:21,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:21,294 INFO L87 Difference]: Start difference. First operand 2060 states and 5157 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:21,723 INFO L93 Difference]: Finished difference Result 2973 states and 6903 transitions. [2021-03-10 21:09:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:09:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:09:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:21,726 INFO L225 Difference]: With dead ends: 2973 [2021-03-10 21:09:21,726 INFO L226 Difference]: Without dead ends: 2903 [2021-03-10 21:09:21,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:09:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2021-03-10 21:09:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2090. [2021-03-10 21:09:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 2.47486835806606) internal successors, (5170), 2089 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 5170 transitions. [2021-03-10 21:09:21,746 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 5170 transitions. Word has length 32 [2021-03-10 21:09:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:21,746 INFO L480 AbstractCegarLoop]: Abstraction has 2090 states and 5170 transitions. [2021-03-10 21:09:21,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 5170 transitions. [2021-03-10 21:09:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:21,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:21,748 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:21,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 21:09:21,949 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:21,949 INFO L82 PathProgramCache]: Analyzing trace with hash -639720651, now seen corresponding path program 10 times [2021-03-10 21:09:21,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:21,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295781630] [2021-03-10 21:09:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:22,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295781630] [2021-03-10 21:09:22,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658433358] [2021-03-10 21:09:22,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:22,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:22,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:22,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:22,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:09:22,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597055165] [2021-03-10 21:09:22,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:22,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:22,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:22,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:22,070 INFO L87 Difference]: Start difference. First operand 2090 states and 5170 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:22,311 INFO L93 Difference]: Finished difference Result 2760 states and 6520 transitions. [2021-03-10 21:09:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:09:22,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:22,313 INFO L225 Difference]: With dead ends: 2760 [2021-03-10 21:09:22,313 INFO L226 Difference]: Without dead ends: 2727 [2021-03-10 21:09:22,313 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:09:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-03-10 21:09:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2064. [2021-03-10 21:09:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.477944740668929) internal successors, (5112), 2063 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5112 transitions. [2021-03-10 21:09:22,331 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5112 transitions. Word has length 35 [2021-03-10 21:09:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:22,332 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 5112 transitions. [2021-03-10 21:09:22,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5112 transitions. [2021-03-10 21:09:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:22,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:22,333 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:22,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:22,546 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash 827459317, now seen corresponding path program 15 times [2021-03-10 21:09:22,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:22,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957497070] [2021-03-10 21:09:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:22,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957497070] [2021-03-10 21:09:22,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515089698] [2021-03-10 21:09:22,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:22,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:09:22,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:09:22,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:22,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:22,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 21:09:22,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738323986] [2021-03-10 21:09:22,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:09:22,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:22,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:09:22,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:09:22,751 INFO L87 Difference]: Start difference. First operand 2064 states and 5112 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:23,070 INFO L93 Difference]: Finished difference Result 2201 states and 5349 transitions. [2021-03-10 21:09:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:09:23,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:23,072 INFO L225 Difference]: With dead ends: 2201 [2021-03-10 21:09:23,072 INFO L226 Difference]: Without dead ends: 2079 [2021-03-10 21:09:23,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:09:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-03-10 21:09:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 2022. [2021-03-10 21:09:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.475507174666007) internal successors, (5003), 2021 states have internal predecessors, (5003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 5003 transitions. [2021-03-10 21:09:23,088 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 5003 transitions. Word has length 35 [2021-03-10 21:09:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:23,088 INFO L480 AbstractCegarLoop]: Abstraction has 2022 states and 5003 transitions. [2021-03-10 21:09:23,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 5003 transitions. [2021-03-10 21:09:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:23,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:23,090 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:23,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:23,290 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:23,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:23,290 INFO L82 PathProgramCache]: Analyzing trace with hash 999532737, now seen corresponding path program 16 times [2021-03-10 21:09:23,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:23,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423989262] [2021-03-10 21:09:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:23,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423989262] [2021-03-10 21:09:23,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263220586] [2021-03-10 21:09:23,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:23,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:23,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:23,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:23,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:23,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:23,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:09:23,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550495301] [2021-03-10 21:09:23,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:23,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:23,402 INFO L87 Difference]: Start difference. First operand 2022 states and 5003 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:23,515 INFO L93 Difference]: Finished difference Result 2201 states and 5360 transitions. [2021-03-10 21:09:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:23,517 INFO L225 Difference]: With dead ends: 2201 [2021-03-10 21:09:23,517 INFO L226 Difference]: Without dead ends: 2201 [2021-03-10 21:09:23,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-03-10 21:09:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2022. [2021-03-10 21:09:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.475507174666007) internal successors, (5003), 2021 states have internal predecessors, (5003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 5003 transitions. [2021-03-10 21:09:23,539 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 5003 transitions. Word has length 35 [2021-03-10 21:09:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:23,539 INFO L480 AbstractCegarLoop]: Abstraction has 2022 states and 5003 transitions. [2021-03-10 21:09:23,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 5003 transitions. [2021-03-10 21:09:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:23,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:23,541 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:23,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 21:09:23,756 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:23,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1845490552, now seen corresponding path program 11 times [2021-03-10 21:09:23,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:23,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281574298] [2021-03-10 21:09:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:23,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281574298] [2021-03-10 21:09:23,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139488477] [2021-03-10 21:09:23,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:23,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:09:23,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:23,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:23,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:23,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:23,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 14 [2021-03-10 21:09:23,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908431057] [2021-03-10 21:09:23,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:09:23,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:23,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:09:23,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:23,911 INFO L87 Difference]: Start difference. First operand 2022 states and 5003 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:24,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:24,066 INFO L93 Difference]: Finished difference Result 2798 states and 6661 transitions. [2021-03-10 21:09:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:09:24,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:24,068 INFO L225 Difference]: With dead ends: 2798 [2021-03-10 21:09:24,068 INFO L226 Difference]: Without dead ends: 2752 [2021-03-10 21:09:24,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:09:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-03-10 21:09:24,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2114. [2021-03-10 21:09:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 2.478466635115949) internal successors, (5237), 2113 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 5237 transitions. [2021-03-10 21:09:24,088 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 5237 transitions. Word has length 35 [2021-03-10 21:09:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:24,088 INFO L480 AbstractCegarLoop]: Abstraction has 2114 states and 5237 transitions. [2021-03-10 21:09:24,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 5237 transitions. [2021-03-10 21:09:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:24,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:24,089 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:24,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-10 21:09:24,290 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:24,290 INFO L82 PathProgramCache]: Analyzing trace with hash -497710840, now seen corresponding path program 12 times [2021-03-10 21:09:24,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:24,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269336861] [2021-03-10 21:09:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:24,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269336861] [2021-03-10 21:09:24,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571204308] [2021-03-10 21:09:24,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:24,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:09:24,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:24,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:24,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:24,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:24,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2021-03-10 21:09:24,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605813843] [2021-03-10 21:09:24,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:24,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:24,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:24,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:24,422 INFO L87 Difference]: Start difference. First operand 2114 states and 5237 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:24,558 INFO L93 Difference]: Finished difference Result 3176 states and 7548 transitions. [2021-03-10 21:09:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:24,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:24,560 INFO L225 Difference]: With dead ends: 3176 [2021-03-10 21:09:24,560 INFO L226 Difference]: Without dead ends: 3176 [2021-03-10 21:09:24,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-03-10 21:09:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2209. [2021-03-10 21:09:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.4909420289855073) internal successors, (5500), 2208 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 5500 transitions. [2021-03-10 21:09:24,582 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 5500 transitions. Word has length 35 [2021-03-10 21:09:24,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:24,582 INFO L480 AbstractCegarLoop]: Abstraction has 2209 states and 5500 transitions. [2021-03-10 21:09:24,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:24,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 5500 transitions. [2021-03-10 21:09:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:24,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:24,584 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:24,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:24,798 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:24,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:24,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2063528053, now seen corresponding path program 13 times [2021-03-10 21:09:24,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:24,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169722282] [2021-03-10 21:09:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:24,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169722282] [2021-03-10 21:09:24,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934274705] [2021-03-10 21:09:24,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:24,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:24,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:09:24,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296191925] [2021-03-10 21:09:24,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:24,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:24,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:24,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:24,910 INFO L87 Difference]: Start difference. First operand 2209 states and 5500 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:25,070 INFO L93 Difference]: Finished difference Result 2851 states and 6844 transitions. [2021-03-10 21:09:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:25,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:25,072 INFO L225 Difference]: With dead ends: 2851 [2021-03-10 21:09:25,072 INFO L226 Difference]: Without dead ends: 2824 [2021-03-10 21:09:25,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:25,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-03-10 21:09:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2301. [2021-03-10 21:09:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 2.484782608695652) internal successors, (5715), 2300 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 5715 transitions. [2021-03-10 21:09:25,107 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 5715 transitions. Word has length 35 [2021-03-10 21:09:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:25,107 INFO L480 AbstractCegarLoop]: Abstraction has 2301 states and 5715 transitions. [2021-03-10 21:09:25,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:25,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 5715 transitions. [2021-03-10 21:09:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:25,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:25,109 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:25,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:25,324 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:25,324 INFO L82 PathProgramCache]: Analyzing trace with hash -731106251, now seen corresponding path program 17 times [2021-03-10 21:09:25,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:25,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243847583] [2021-03-10 21:09:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:25,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243847583] [2021-03-10 21:09:25,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488466175] [2021-03-10 21:09:25,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:25,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:09:25,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:25,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:25,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:25,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:25,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:09:25,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114182926] [2021-03-10 21:09:25,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:25,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:25,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:25,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:25,447 INFO L87 Difference]: Start difference. First operand 2301 states and 5715 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:25,673 INFO L93 Difference]: Finished difference Result 2591 states and 6262 transitions. [2021-03-10 21:09:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:25,676 INFO L225 Difference]: With dead ends: 2591 [2021-03-10 21:09:25,676 INFO L226 Difference]: Without dead ends: 2551 [2021-03-10 21:09:25,676 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-03-10 21:09:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2283. [2021-03-10 21:09:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 2.4794040315512706) internal successors, (5658), 2282 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 5658 transitions. [2021-03-10 21:09:25,704 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 5658 transitions. Word has length 35 [2021-03-10 21:09:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:25,704 INFO L480 AbstractCegarLoop]: Abstraction has 2283 states and 5658 transitions. [2021-03-10 21:09:25,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 5658 transitions. [2021-03-10 21:09:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:25,706 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:25,706 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:25,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:25,906 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1344642431, now seen corresponding path program 18 times [2021-03-10 21:09:25,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:25,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200208968] [2021-03-10 21:09:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:25,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200208968] [2021-03-10 21:09:25,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068229852] [2021-03-10 21:09:25,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:25,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:09:25,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:25,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:25,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:26,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:26,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:09:26,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879476076] [2021-03-10 21:09:26,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:26,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:26,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:26,017 INFO L87 Difference]: Start difference. First operand 2283 states and 5658 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:26,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:26,171 INFO L93 Difference]: Finished difference Result 2751 states and 6621 transitions. [2021-03-10 21:09:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:26,174 INFO L225 Difference]: With dead ends: 2751 [2021-03-10 21:09:26,174 INFO L226 Difference]: Without dead ends: 2724 [2021-03-10 21:09:26,174 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:26,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-03-10 21:09:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2280. [2021-03-10 21:09:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.4787187362878456) internal successors, (5649), 2279 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 5649 transitions. [2021-03-10 21:09:26,194 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 5649 transitions. Word has length 35 [2021-03-10 21:09:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:26,194 INFO L480 AbstractCegarLoop]: Abstraction has 2280 states and 5649 transitions. [2021-03-10 21:09:26,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:26,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 5649 transitions. [2021-03-10 21:09:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:26,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:26,196 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:26,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-10 21:09:26,410 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:26,411 INFO L82 PathProgramCache]: Analyzing trace with hash 797274903, now seen corresponding path program 19 times [2021-03-10 21:09:26,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:26,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600575695] [2021-03-10 21:09:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:26,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600575695] [2021-03-10 21:09:26,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987462847] [2021-03-10 21:09:26,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:26,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:26,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:26,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:26,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:09:26,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406774046] [2021-03-10 21:09:26,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:26,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:26,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:26,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:26,523 INFO L87 Difference]: Start difference. First operand 2280 states and 5649 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:26,698 INFO L93 Difference]: Finished difference Result 2999 states and 7153 transitions. [2021-03-10 21:09:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:09:26,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:26,700 INFO L225 Difference]: With dead ends: 2999 [2021-03-10 21:09:26,701 INFO L226 Difference]: Without dead ends: 2987 [2021-03-10 21:09:26,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2021-03-10 21:09:26,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 2269. [2021-03-10 21:09:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 2.4775132275132274) internal successors, (5619), 2268 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 5619 transitions. [2021-03-10 21:09:26,721 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 5619 transitions. Word has length 35 [2021-03-10 21:09:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:26,721 INFO L480 AbstractCegarLoop]: Abstraction has 2269 states and 5619 transitions. [2021-03-10 21:09:26,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 5619 transitions. [2021-03-10 21:09:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:26,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:26,723 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:26,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 21:09:26,923 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:26,924 INFO L82 PathProgramCache]: Analyzing trace with hash 559213386, now seen corresponding path program 14 times [2021-03-10 21:09:26,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:26,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045650399] [2021-03-10 21:09:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:26,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045650399] [2021-03-10 21:09:26,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416304381] [2021-03-10 21:09:26,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:26,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:26,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:26,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:27,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:27,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-03-10 21:09:27,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343316004] [2021-03-10 21:09:27,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:27,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:27,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:27,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:27,025 INFO L87 Difference]: Start difference. First operand 2269 states and 5619 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:27,133 INFO L93 Difference]: Finished difference Result 3112 states and 7419 transitions. [2021-03-10 21:09:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:27,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:27,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:27,136 INFO L225 Difference]: With dead ends: 3112 [2021-03-10 21:09:27,136 INFO L226 Difference]: Without dead ends: 3104 [2021-03-10 21:09:27,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-03-10 21:09:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2376. [2021-03-10 21:09:27,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 2.5010526315789474) internal successors, (5940), 2375 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 5940 transitions. [2021-03-10 21:09:27,159 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 5940 transitions. Word has length 35 [2021-03-10 21:09:27,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:27,159 INFO L480 AbstractCegarLoop]: Abstraction has 2376 states and 5940 transitions. [2021-03-10 21:09:27,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 5940 transitions. [2021-03-10 21:09:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:27,161 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:27,161 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:27,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 21:09:27,363 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:27,363 INFO L82 PathProgramCache]: Analyzing trace with hash -62667024, now seen corresponding path program 15 times [2021-03-10 21:09:27,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:27,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720265737] [2021-03-10 21:09:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:27,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720265737] [2021-03-10 21:09:27,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374778952] [2021-03-10 21:09:27,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:27,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:09:27,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:27,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:27,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:27,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:27,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-03-10 21:09:27,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230563390] [2021-03-10 21:09:27,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:27,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:27,475 INFO L87 Difference]: Start difference. First operand 2376 states and 5940 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:27,584 INFO L93 Difference]: Finished difference Result 3491 states and 8281 transitions. [2021-03-10 21:09:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:27,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:27,587 INFO L225 Difference]: With dead ends: 3491 [2021-03-10 21:09:27,587 INFO L226 Difference]: Without dead ends: 3491 [2021-03-10 21:09:27,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2021-03-10 21:09:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 2384. [2021-03-10 21:09:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 2.498531263113722) internal successors, (5954), 2383 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 5954 transitions. [2021-03-10 21:09:27,611 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 5954 transitions. Word has length 35 [2021-03-10 21:09:27,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:27,611 INFO L480 AbstractCegarLoop]: Abstraction has 2384 states and 5954 transitions. [2021-03-10 21:09:27,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 5954 transitions. [2021-03-10 21:09:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:27,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:27,613 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:27,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:27,813 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:27,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:27,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1700239480, now seen corresponding path program 16 times [2021-03-10 21:09:27,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:27,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372531520] [2021-03-10 21:09:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372531520] [2021-03-10 21:09:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679461214] [2021-03-10 21:09:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:27,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:27,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:27,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:27,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:27,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:27,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-03-10 21:09:27,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419077110] [2021-03-10 21:09:27,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:27,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:27,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:27,925 INFO L87 Difference]: Start difference. First operand 2384 states and 5954 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:28,071 INFO L93 Difference]: Finished difference Result 3214 states and 7628 transitions. [2021-03-10 21:09:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:28,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:28,074 INFO L225 Difference]: With dead ends: 3214 [2021-03-10 21:09:28,075 INFO L226 Difference]: Without dead ends: 3214 [2021-03-10 21:09:28,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-03-10 21:09:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2183. [2021-03-10 21:09:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 2.480293308890926) internal successors, (5412), 2182 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 5412 transitions. [2021-03-10 21:09:28,096 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 5412 transitions. Word has length 35 [2021-03-10 21:09:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:28,096 INFO L480 AbstractCegarLoop]: Abstraction has 2183 states and 5412 transitions. [2021-03-10 21:09:28,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 5412 transitions. [2021-03-10 21:09:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:28,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:28,098 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:28,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-10 21:09:28,298 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash -491585496, now seen corresponding path program 20 times [2021-03-10 21:09:28,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:28,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179730381] [2021-03-10 21:09:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:28,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179730381] [2021-03-10 21:09:28,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072501336] [2021-03-10 21:09:28,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:28,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:28,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:28,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:28,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:28,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:28,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 21:09:28,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883055224] [2021-03-10 21:09:28,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:28,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:28,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:28,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:28,401 INFO L87 Difference]: Start difference. First operand 2183 states and 5412 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:28,476 INFO L93 Difference]: Finished difference Result 2850 states and 6871 transitions. [2021-03-10 21:09:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:28,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:28,479 INFO L225 Difference]: With dead ends: 2850 [2021-03-10 21:09:28,479 INFO L226 Difference]: Without dead ends: 2850 [2021-03-10 21:09:28,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-03-10 21:09:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2296. [2021-03-10 21:09:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 2.512854030501089) internal successors, (5767), 2295 states have internal predecessors, (5767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 5767 transitions. [2021-03-10 21:09:28,500 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 5767 transitions. Word has length 35 [2021-03-10 21:09:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:28,500 INFO L480 AbstractCegarLoop]: Abstraction has 2296 states and 5767 transitions. [2021-03-10 21:09:28,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 5767 transitions. [2021-03-10 21:09:28,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:28,502 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:28,502 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:28,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:28,702 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:28,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash -729647013, now seen corresponding path program 17 times [2021-03-10 21:09:28,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:28,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200695675] [2021-03-10 21:09:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:28,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200695675] [2021-03-10 21:09:28,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120011245] [2021-03-10 21:09:28,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:28,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:09:28,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:28,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:28,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:28,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:28,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:09:28,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882355523] [2021-03-10 21:09:28,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:28,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:28,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:28,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:28,816 INFO L87 Difference]: Start difference. First operand 2296 states and 5767 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:28,961 INFO L93 Difference]: Finished difference Result 3117 states and 7487 transitions. [2021-03-10 21:09:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:28,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:28,964 INFO L225 Difference]: With dead ends: 3117 [2021-03-10 21:09:28,964 INFO L226 Difference]: Without dead ends: 3062 [2021-03-10 21:09:28,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-03-10 21:09:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2364. [2021-03-10 21:09:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 2.5112145577655522) internal successors, (5934), 2363 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 5934 transitions. [2021-03-10 21:09:28,986 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 5934 transitions. Word has length 35 [2021-03-10 21:09:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:28,986 INFO L480 AbstractCegarLoop]: Abstraction has 2364 states and 5934 transitions. [2021-03-10 21:09:28,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 5934 transitions. [2021-03-10 21:09:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:28,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:28,988 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:29,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:29,191 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2011623426, now seen corresponding path program 21 times [2021-03-10 21:09:29,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:29,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43564497] [2021-03-10 21:09:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:09:29,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43564497] [2021-03-10 21:09:29,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968477276] [2021-03-10 21:09:29,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:29,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:09:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:29,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:09:29,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:29,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 21:09:29,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828810436] [2021-03-10 21:09:29,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:29,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:29,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:29,291 INFO L87 Difference]: Start difference. First operand 2364 states and 5934 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:29,368 INFO L93 Difference]: Finished difference Result 2831 states and 6829 transitions. [2021-03-10 21:09:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:29,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:29,370 INFO L225 Difference]: With dead ends: 2831 [2021-03-10 21:09:29,370 INFO L226 Difference]: Without dead ends: 2828 [2021-03-10 21:09:29,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-03-10 21:09:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2362. [2021-03-10 21:09:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 2.508259212198221) internal successors, (5922), 2361 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 5922 transitions. [2021-03-10 21:09:29,395 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 5922 transitions. Word has length 35 [2021-03-10 21:09:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:29,395 INFO L480 AbstractCegarLoop]: Abstraction has 2362 states and 5922 transitions. [2021-03-10 21:09:29,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 5922 transitions. [2021-03-10 21:09:29,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:29,398 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:29,398 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:29,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:29,611 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2076281304, now seen corresponding path program 22 times [2021-03-10 21:09:29,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:29,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477347520] [2021-03-10 21:09:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477347520] [2021-03-10 21:09:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407629568] [2021-03-10 21:09:29,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:29,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:29,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:29,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:29,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:29,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:29,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 21:09:29,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429747450] [2021-03-10 21:09:29,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:29,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:29,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:29,712 INFO L87 Difference]: Start difference. First operand 2362 states and 5922 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:29,807 INFO L93 Difference]: Finished difference Result 2865 states and 6866 transitions. [2021-03-10 21:09:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:29,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:29,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:29,809 INFO L225 Difference]: With dead ends: 2865 [2021-03-10 21:09:29,809 INFO L226 Difference]: Without dead ends: 2847 [2021-03-10 21:09:29,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-03-10 21:09:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2380. [2021-03-10 21:09:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.503572929802438) internal successors, (5956), 2379 states have internal predecessors, (5956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 5956 transitions. [2021-03-10 21:09:29,839 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 5956 transitions. Word has length 35 [2021-03-10 21:09:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:29,840 INFO L480 AbstractCegarLoop]: Abstraction has 2380 states and 5956 transitions. [2021-03-10 21:09:29,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 5956 transitions. [2021-03-10 21:09:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:29,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:29,841 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:30,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:30,042 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:30,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:30,042 INFO L82 PathProgramCache]: Analyzing trace with hash 770685979, now seen corresponding path program 23 times [2021-03-10 21:09:30,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:30,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367505392] [2021-03-10 21:09:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:30,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367505392] [2021-03-10 21:09:30,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475160431] [2021-03-10 21:09:30,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:30,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:09:30,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:30,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:30,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:30,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:30,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:09:30,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089905077] [2021-03-10 21:09:30,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:30,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:30,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:30,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:30,162 INFO L87 Difference]: Start difference. First operand 2380 states and 5956 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:30,367 INFO L93 Difference]: Finished difference Result 2794 states and 6728 transitions. [2021-03-10 21:09:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:30,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:30,369 INFO L225 Difference]: With dead ends: 2794 [2021-03-10 21:09:30,369 INFO L226 Difference]: Without dead ends: 2706 [2021-03-10 21:09:30,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-03-10 21:09:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2267. [2021-03-10 21:09:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2266 states have (on average 2.494263018534863) internal successors, (5652), 2266 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 5652 transitions. [2021-03-10 21:09:30,390 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 5652 transitions. Word has length 35 [2021-03-10 21:09:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:30,390 INFO L480 AbstractCegarLoop]: Abstraction has 2267 states and 5652 transitions. [2021-03-10 21:09:30,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 5652 transitions. [2021-03-10 21:09:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:30,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:30,392 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:30,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:30,592 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:30,592 INFO L82 PathProgramCache]: Analyzing trace with hash -149688, now seen corresponding path program 18 times [2021-03-10 21:09:30,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:30,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105200893] [2021-03-10 21:09:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:30,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105200893] [2021-03-10 21:09:30,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419723024] [2021-03-10 21:09:30,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:30,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:09:30,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:30,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:30,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:30,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:30,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-03-10 21:09:30,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591979070] [2021-03-10 21:09:30,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:30,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:30,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:30,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:30,697 INFO L87 Difference]: Start difference. First operand 2267 states and 5652 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:30,813 INFO L93 Difference]: Finished difference Result 2943 states and 7060 transitions. [2021-03-10 21:09:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:30,813 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:30,815 INFO L225 Difference]: With dead ends: 2943 [2021-03-10 21:09:30,815 INFO L226 Difference]: Without dead ends: 2933 [2021-03-10 21:09:30,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2021-03-10 21:09:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2378. [2021-03-10 21:09:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.4981068573832563) internal successors, (5938), 2377 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 5938 transitions. [2021-03-10 21:09:30,838 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 5938 transitions. Word has length 35 [2021-03-10 21:09:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:30,838 INFO L480 AbstractCegarLoop]: Abstraction has 2378 states and 5938 transitions. [2021-03-10 21:09:30,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 5938 transitions. [2021-03-10 21:09:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:30,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:30,840 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:31,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 21:09:31,043 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:31,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:31,044 INFO L82 PathProgramCache]: Analyzing trace with hash -463341054, now seen corresponding path program 24 times [2021-03-10 21:09:31,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:31,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396833128] [2021-03-10 21:09:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:31,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396833128] [2021-03-10 21:09:31,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082771292] [2021-03-10 21:09:31,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:31,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:09:31,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:31,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:31,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:31,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:09:31,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537537558] [2021-03-10 21:09:31,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:31,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:31,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:31,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:31,155 INFO L87 Difference]: Start difference. First operand 2378 states and 5938 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:31,279 INFO L93 Difference]: Finished difference Result 2885 states and 6878 transitions. [2021-03-10 21:09:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:31,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:31,282 INFO L225 Difference]: With dead ends: 2885 [2021-03-10 21:09:31,282 INFO L226 Difference]: Without dead ends: 2861 [2021-03-10 21:09:31,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-03-10 21:09:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2242. [2021-03-10 21:09:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 2.4792503346720216) internal successors, (5556), 2241 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 5556 transitions. [2021-03-10 21:09:31,303 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 5556 transitions. Word has length 35 [2021-03-10 21:09:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:31,303 INFO L480 AbstractCegarLoop]: Abstraction has 2242 states and 5556 transitions. [2021-03-10 21:09:31,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 5556 transitions. [2021-03-10 21:09:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:31,305 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:31,305 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:31,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:31,518 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:31,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1841063629, now seen corresponding path program 25 times [2021-03-10 21:09:31,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:31,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355448124] [2021-03-10 21:09:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:31,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355448124] [2021-03-10 21:09:31,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533535897] [2021-03-10 21:09:31,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:31,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:31,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:31,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:31,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:09:31,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831307637] [2021-03-10 21:09:31,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:31,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:31,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:31,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:31,631 INFO L87 Difference]: Start difference. First operand 2242 states and 5556 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:31,861 INFO L93 Difference]: Finished difference Result 2947 states and 6928 transitions. [2021-03-10 21:09:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:09:31,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:31,863 INFO L225 Difference]: With dead ends: 2947 [2021-03-10 21:09:31,863 INFO L226 Difference]: Without dead ends: 2875 [2021-03-10 21:09:31,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:09:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-03-10 21:09:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2136. [2021-03-10 21:09:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.4782201405152224) internal successors, (5291), 2135 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 5291 transitions. [2021-03-10 21:09:31,883 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 5291 transitions. Word has length 35 [2021-03-10 21:09:31,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:31,883 INFO L480 AbstractCegarLoop]: Abstraction has 2136 states and 5291 transitions. [2021-03-10 21:09:31,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 5291 transitions. [2021-03-10 21:09:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:31,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:31,885 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:32,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:32,085 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:32,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1593961740, now seen corresponding path program 19 times [2021-03-10 21:09:32,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:32,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100578943] [2021-03-10 21:09:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:32,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100578943] [2021-03-10 21:09:32,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304477823] [2021-03-10 21:09:32,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:32,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:32,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:32,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:32,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-03-10 21:09:32,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652738298] [2021-03-10 21:09:32,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:32,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:32,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:32,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:32,184 INFO L87 Difference]: Start difference. First operand 2136 states and 5291 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:32,304 INFO L93 Difference]: Finished difference Result 3361 states and 7950 transitions. [2021-03-10 21:09:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:32,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:32,307 INFO L225 Difference]: With dead ends: 3361 [2021-03-10 21:09:32,307 INFO L226 Difference]: Without dead ends: 3361 [2021-03-10 21:09:32,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-03-10 21:09:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2207. [2021-03-10 21:09:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.49637352674524) internal successors, (5507), 2206 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 5507 transitions. [2021-03-10 21:09:32,329 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 5507 transitions. Word has length 35 [2021-03-10 21:09:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:32,329 INFO L480 AbstractCegarLoop]: Abstraction has 2207 states and 5507 transitions. [2021-03-10 21:09:32,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 5507 transitions. [2021-03-10 21:09:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:32,331 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:32,331 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:32,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-03-10 21:09:32,531 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:32,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:32,531 INFO L82 PathProgramCache]: Analyzing trace with hash -43610716, now seen corresponding path program 20 times [2021-03-10 21:09:32,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:32,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598727380] [2021-03-10 21:09:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:32,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598727380] [2021-03-10 21:09:32,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538935891] [2021-03-10 21:09:32,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:32,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:32,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:32,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:32,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:32,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-03-10 21:09:32,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876782781] [2021-03-10 21:09:32,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:32,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:32,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:32,649 INFO L87 Difference]: Start difference. First operand 2207 states and 5507 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:32,806 INFO L93 Difference]: Finished difference Result 3348 states and 7925 transitions. [2021-03-10 21:09:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:09:32,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:32,808 INFO L225 Difference]: With dead ends: 3348 [2021-03-10 21:09:32,808 INFO L226 Difference]: Without dead ends: 3348 [2021-03-10 21:09:32,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-03-10 21:09:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2224. [2021-03-10 21:09:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.5006747638326585) internal successors, (5559), 2223 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5559 transitions. [2021-03-10 21:09:32,831 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5559 transitions. Word has length 35 [2021-03-10 21:09:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:32,831 INFO L480 AbstractCegarLoop]: Abstraction has 2224 states and 5559 transitions. [2021-03-10 21:09:32,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5559 transitions. [2021-03-10 21:09:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:32,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:32,833 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:33,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 21:09:33,033 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:33,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1733605880, now seen corresponding path program 21 times [2021-03-10 21:09:33,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:33,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658523133] [2021-03-10 21:09:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:33,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658523133] [2021-03-10 21:09:33,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406262126] [2021-03-10 21:09:33,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:33,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:09:33,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:33,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:33,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:33,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:33,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:09:33,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509335239] [2021-03-10 21:09:33,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:33,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:33,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:33,157 INFO L87 Difference]: Start difference. First operand 2224 states and 5559 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:33,352 INFO L93 Difference]: Finished difference Result 2976 states and 7062 transitions. [2021-03-10 21:09:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:33,352 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:33,355 INFO L225 Difference]: With dead ends: 2976 [2021-03-10 21:09:33,355 INFO L226 Difference]: Without dead ends: 2976 [2021-03-10 21:09:33,355 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:09:33,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-03-10 21:09:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 1957. [2021-03-10 21:09:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1956 states have (on average 2.486196319018405) internal successors, (4863), 1956 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 4863 transitions. [2021-03-10 21:09:33,374 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 4863 transitions. Word has length 35 [2021-03-10 21:09:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:33,374 INFO L480 AbstractCegarLoop]: Abstraction has 1957 states and 4863 transitions. [2021-03-10 21:09:33,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 4863 transitions. [2021-03-10 21:09:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:33,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:33,376 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:33,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 21:09:33,580 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1454460952, now seen corresponding path program 26 times [2021-03-10 21:09:33,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:33,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681631001] [2021-03-10 21:09:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:33,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681631001] [2021-03-10 21:09:33,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570170096] [2021-03-10 21:09:33,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:33,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:33,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:33,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:33,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:33,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:09:33,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355735526] [2021-03-10 21:09:33,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:33,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:33,697 INFO L87 Difference]: Start difference. First operand 1957 states and 4863 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:33,807 INFO L93 Difference]: Finished difference Result 2321 states and 5547 transitions. [2021-03-10 21:09:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:33,809 INFO L225 Difference]: With dead ends: 2321 [2021-03-10 21:09:33,809 INFO L226 Difference]: Without dead ends: 2294 [2021-03-10 21:09:33,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:33,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-03-10 21:09:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1966. [2021-03-10 21:09:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 2.482442748091603) internal successors, (4878), 1965 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 4878 transitions. [2021-03-10 21:09:33,832 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 4878 transitions. Word has length 35 [2021-03-10 21:09:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:33,832 INFO L480 AbstractCegarLoop]: Abstraction has 1966 states and 4878 transitions. [2021-03-10 21:09:33,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 4878 transitions. [2021-03-10 21:09:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:33,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:33,834 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:34,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 21:09:34,049 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:34,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1762298494, now seen corresponding path program 27 times [2021-03-10 21:09:34,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:34,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711110685] [2021-03-10 21:09:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:34,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711110685] [2021-03-10 21:09:34,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465415821] [2021-03-10 21:09:34,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:34,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:09:34,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:34,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:34,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:09:34,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469817842] [2021-03-10 21:09:34,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:34,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:34,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:34,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:34,157 INFO L87 Difference]: Start difference. First operand 1966 states and 4878 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:34,300 INFO L93 Difference]: Finished difference Result 2657 states and 6397 transitions. [2021-03-10 21:09:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:34,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:34,303 INFO L225 Difference]: With dead ends: 2657 [2021-03-10 21:09:34,303 INFO L226 Difference]: Without dead ends: 2657 [2021-03-10 21:09:34,303 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-03-10 21:09:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 1901. [2021-03-10 21:09:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 2.5042105263157897) internal successors, (4758), 1900 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 4758 transitions. [2021-03-10 21:09:34,321 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 4758 transitions. Word has length 35 [2021-03-10 21:09:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:34,321 INFO L480 AbstractCegarLoop]: Abstraction has 1901 states and 4758 transitions. [2021-03-10 21:09:34,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 4758 transitions. [2021-03-10 21:09:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:34,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:34,322 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:34,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:34,523 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:34,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:34,523 INFO L82 PathProgramCache]: Analyzing trace with hash -208710795, now seen corresponding path program 22 times [2021-03-10 21:09:34,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:34,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5046998] [2021-03-10 21:09:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:34,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5046998] [2021-03-10 21:09:34,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593978938] [2021-03-10 21:09:34,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:34,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:34,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:34,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:34,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:09:34,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656265948] [2021-03-10 21:09:34,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:34,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:34,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:34,638 INFO L87 Difference]: Start difference. First operand 1901 states and 4758 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:34,833 INFO L93 Difference]: Finished difference Result 2516 states and 6043 transitions. [2021-03-10 21:09:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:09:34,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:34,835 INFO L225 Difference]: With dead ends: 2516 [2021-03-10 21:09:34,835 INFO L226 Difference]: Without dead ends: 2502 [2021-03-10 21:09:34,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:09:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-03-10 21:09:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 1901. [2021-03-10 21:09:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 2.5078947368421054) internal successors, (4765), 1900 states have internal predecessors, (4765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 4765 transitions. [2021-03-10 21:09:34,852 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 4765 transitions. Word has length 35 [2021-03-10 21:09:34,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:34,852 INFO L480 AbstractCegarLoop]: Abstraction has 1901 states and 4765 transitions. [2021-03-10 21:09:34,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 4765 transitions. [2021-03-10 21:09:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:34,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:34,854 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:35,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:35,054 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash -385601739, now seen corresponding path program 28 times [2021-03-10 21:09:35,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:35,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392365174] [2021-03-10 21:09:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:35,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392365174] [2021-03-10 21:09:35,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835747524] [2021-03-10 21:09:35,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:35,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:35,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:35,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:35,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:35,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:35,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-10 21:09:35,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317336030] [2021-03-10 21:09:35,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:09:35,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:35,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:09:35,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:35,234 INFO L87 Difference]: Start difference. First operand 1901 states and 4765 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:35,459 INFO L93 Difference]: Finished difference Result 1956 states and 4854 transitions. [2021-03-10 21:09:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:35,460 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:35,461 INFO L225 Difference]: With dead ends: 1956 [2021-03-10 21:09:35,461 INFO L226 Difference]: Without dead ends: 1918 [2021-03-10 21:09:35,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-03-10 21:09:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1892. [2021-03-10 21:09:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 2.5055526176626124) internal successors, (4738), 1891 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 4738 transitions. [2021-03-10 21:09:35,477 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 4738 transitions. Word has length 35 [2021-03-10 21:09:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:35,477 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 4738 transitions. [2021-03-10 21:09:35,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 4738 transitions. [2021-03-10 21:09:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:35,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:35,478 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:35,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:35,678 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:35,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:35,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1551170986, now seen corresponding path program 29 times [2021-03-10 21:09:35,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:35,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694281005] [2021-03-10 21:09:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:35,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694281005] [2021-03-10 21:09:35,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100053783] [2021-03-10 21:09:35,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:35,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:09:35,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:35,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:35,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:35,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-03-10 21:09:35,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589666840] [2021-03-10 21:09:35,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:35,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:35,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:35,792 INFO L87 Difference]: Start difference. First operand 1892 states and 4738 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:35,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:35,938 INFO L93 Difference]: Finished difference Result 2783 states and 6718 transitions. [2021-03-10 21:09:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:35,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:35,940 INFO L225 Difference]: With dead ends: 2783 [2021-03-10 21:09:35,941 INFO L226 Difference]: Without dead ends: 2783 [2021-03-10 21:09:35,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-03-10 21:09:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2022. [2021-03-10 21:09:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.5472538347352796) internal successors, (5148), 2021 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 5148 transitions. [2021-03-10 21:09:35,962 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 5148 transitions. Word has length 35 [2021-03-10 21:09:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:35,962 INFO L480 AbstractCegarLoop]: Abstraction has 2022 states and 5148 transitions. [2021-03-10 21:09:35,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 5148 transitions. [2021-03-10 21:09:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:35,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:35,963 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:36,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 21:09:36,179 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash 780335319, now seen corresponding path program 23 times [2021-03-10 21:09:36,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:36,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428879753] [2021-03-10 21:09:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:36,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428879753] [2021-03-10 21:09:36,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218790069] [2021-03-10 21:09:36,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:36,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:09:36,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:36,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:36,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:36,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:09:36,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56155616] [2021-03-10 21:09:36,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:36,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:36,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:36,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:36,290 INFO L87 Difference]: Start difference. First operand 2022 states and 5148 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:36,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:36,471 INFO L93 Difference]: Finished difference Result 2467 states and 6075 transitions. [2021-03-10 21:09:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:09:36,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:36,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:36,473 INFO L225 Difference]: With dead ends: 2467 [2021-03-10 21:09:36,473 INFO L226 Difference]: Without dead ends: 2467 [2021-03-10 21:09:36,473 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:36,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-03-10 21:09:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2030. [2021-03-10 21:09:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 2.5490389354361755) internal successors, (5172), 2029 states have internal predecessors, (5172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5172 transitions. [2021-03-10 21:09:36,490 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5172 transitions. Word has length 35 [2021-03-10 21:09:36,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:36,491 INFO L480 AbstractCegarLoop]: Abstraction has 2030 states and 5172 transitions. [2021-03-10 21:09:36,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5172 transitions. [2021-03-10 21:09:36,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:36,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:36,492 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:36,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-03-10 21:09:36,692 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash -852961065, now seen corresponding path program 30 times [2021-03-10 21:09:36,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:36,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685888101] [2021-03-10 21:09:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:36,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685888101] [2021-03-10 21:09:36,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540528618] [2021-03-10 21:09:36,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:36,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:09:36,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:36,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:09:36,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:36,898 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 21:09:36,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-03-10 21:09:36,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:36,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:36,905 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:09:36,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:36,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2021-03-10 21:09:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:36,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:36,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-03-10 21:09:36,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341719677] [2021-03-10 21:09:36,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:09:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:09:36,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:09:36,937 INFO L87 Difference]: Start difference. First operand 2030 states and 5172 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:37,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:37,604 INFO L93 Difference]: Finished difference Result 2727 states and 6619 transitions. [2021-03-10 21:09:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:09:37,604 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:37,606 INFO L225 Difference]: With dead ends: 2727 [2021-03-10 21:09:37,606 INFO L226 Difference]: Without dead ends: 2704 [2021-03-10 21:09:37,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:09:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-03-10 21:09:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 1971. [2021-03-10 21:09:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1970 states have (on average 2.567005076142132) internal successors, (5057), 1970 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 5057 transitions. [2021-03-10 21:09:37,625 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 5057 transitions. Word has length 35 [2021-03-10 21:09:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:37,625 INFO L480 AbstractCegarLoop]: Abstraction has 1971 states and 5057 transitions. [2021-03-10 21:09:37,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 5057 transitions. [2021-03-10 21:09:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:37,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:37,626 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:37,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-10 21:09:37,826 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:37,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:37,827 INFO L82 PathProgramCache]: Analyzing trace with hash 700626634, now seen corresponding path program 24 times [2021-03-10 21:09:37,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:37,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675041711] [2021-03-10 21:09:37,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:37,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675041711] [2021-03-10 21:09:37,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341037196] [2021-03-10 21:09:37,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:37,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:09:37,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:37,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:37,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:37,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:37,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-03-10 21:09:37,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014101060] [2021-03-10 21:09:37,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:09:37,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:37,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:09:37,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:37,946 INFO L87 Difference]: Start difference. First operand 1971 states and 5057 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:38,088 INFO L93 Difference]: Finished difference Result 2403 states and 5943 transitions. [2021-03-10 21:09:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:38,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:38,090 INFO L225 Difference]: With dead ends: 2403 [2021-03-10 21:09:38,091 INFO L226 Difference]: Without dead ends: 2387 [2021-03-10 21:09:38,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2021-03-10 21:09:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 1957. [2021-03-10 21:09:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1956 states have (on average 2.571063394683027) internal successors, (5029), 1956 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 5029 transitions. [2021-03-10 21:09:38,108 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 5029 transitions. Word has length 35 [2021-03-10 21:09:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:38,108 INFO L480 AbstractCegarLoop]: Abstraction has 1957 states and 5029 transitions. [2021-03-10 21:09:38,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 5029 transitions. [2021-03-10 21:09:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:38,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:38,109 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:38,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-10 21:09:38,310 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:38,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:38,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1273583998, now seen corresponding path program 31 times [2021-03-10 21:09:38,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:38,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805293699] [2021-03-10 21:09:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:38,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805293699] [2021-03-10 21:09:38,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577263511] [2021-03-10 21:09:38,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:38,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:38,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:38,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:38,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 21:09:38,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309986566] [2021-03-10 21:09:38,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:38,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:38,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:38,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:38,408 INFO L87 Difference]: Start difference. First operand 1957 states and 5029 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:38,491 INFO L93 Difference]: Finished difference Result 2847 states and 7037 transitions. [2021-03-10 21:09:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:38,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:38,494 INFO L225 Difference]: With dead ends: 2847 [2021-03-10 21:09:38,494 INFO L226 Difference]: Without dead ends: 2847 [2021-03-10 21:09:38,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-03-10 21:09:38,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2129. [2021-03-10 21:09:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 2.6080827067669174) internal successors, (5550), 2128 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 5550 transitions. [2021-03-10 21:09:38,514 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 5550 transitions. Word has length 35 [2021-03-10 21:09:38,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:38,514 INFO L480 AbstractCegarLoop]: Abstraction has 2129 states and 5550 transitions. [2021-03-10 21:09:38,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 5550 transitions. [2021-03-10 21:09:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:38,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:38,515 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:38,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:38,716 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:38,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1511645515, now seen corresponding path program 25 times [2021-03-10 21:09:38,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:38,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51998960] [2021-03-10 21:09:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:38,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51998960] [2021-03-10 21:09:38,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241512033] [2021-03-10 21:09:38,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:38,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:38,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:38,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:38,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:09:38,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604029534] [2021-03-10 21:09:38,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:38,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:38,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:38,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:38,821 INFO L87 Difference]: Start difference. First operand 2129 states and 5550 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:38,961 INFO L93 Difference]: Finished difference Result 2551 states and 6430 transitions. [2021-03-10 21:09:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:38,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:38,963 INFO L225 Difference]: With dead ends: 2551 [2021-03-10 21:09:38,963 INFO L226 Difference]: Without dead ends: 2542 [2021-03-10 21:09:38,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-03-10 21:09:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2190. [2021-03-10 21:09:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 2.600274097761535) internal successors, (5692), 2189 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 5692 transitions. [2021-03-10 21:09:38,982 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 5692 transitions. Word has length 35 [2021-03-10 21:09:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:38,982 INFO L480 AbstractCegarLoop]: Abstraction has 2190 states and 5692 transitions. [2021-03-10 21:09:38,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 5692 transitions. [2021-03-10 21:09:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:38,984 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:38,984 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:39,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:39,185 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1229624924, now seen corresponding path program 32 times [2021-03-10 21:09:39,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:39,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356241142] [2021-03-10 21:09:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:39,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356241142] [2021-03-10 21:09:39,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706814334] [2021-03-10 21:09:39,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:39,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:39,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:39,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:39,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:39,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 21:09:39,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445029068] [2021-03-10 21:09:39,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:39,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:39,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:39,282 INFO L87 Difference]: Start difference. First operand 2190 states and 5692 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:39,368 INFO L93 Difference]: Finished difference Result 2865 states and 7074 transitions. [2021-03-10 21:09:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:39,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:39,371 INFO L225 Difference]: With dead ends: 2865 [2021-03-10 21:09:39,371 INFO L226 Difference]: Without dead ends: 2862 [2021-03-10 21:09:39,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2021-03-10 21:09:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2189. [2021-03-10 21:09:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 2.5987202925045705) internal successors, (5686), 2188 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 5686 transitions. [2021-03-10 21:09:39,394 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 5686 transitions. Word has length 35 [2021-03-10 21:09:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:39,394 INFO L480 AbstractCegarLoop]: Abstraction has 2189 states and 5686 transitions. [2021-03-10 21:09:39,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 5686 transitions. [2021-03-10 21:09:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:39,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:39,396 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:39,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-03-10 21:09:39,600 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:39,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:39,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1436687490, now seen corresponding path program 33 times [2021-03-10 21:09:39,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:39,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631705347] [2021-03-10 21:09:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:39,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631705347] [2021-03-10 21:09:39,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13068068] [2021-03-10 21:09:39,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:39,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:09:39,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:39,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:39,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:39,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 21:09:39,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761025891] [2021-03-10 21:09:39,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:39,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:39,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:39,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:39,704 INFO L87 Difference]: Start difference. First operand 2189 states and 5686 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:39,783 INFO L93 Difference]: Finished difference Result 2790 states and 7006 transitions. [2021-03-10 21:09:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:39,786 INFO L225 Difference]: With dead ends: 2790 [2021-03-10 21:09:39,786 INFO L226 Difference]: Without dead ends: 2778 [2021-03-10 21:09:39,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-03-10 21:09:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2189. [2021-03-10 21:09:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 2.5973491773308957) internal successors, (5683), 2188 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 5683 transitions. [2021-03-10 21:09:39,807 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 5683 transitions. Word has length 35 [2021-03-10 21:09:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:39,807 INFO L480 AbstractCegarLoop]: Abstraction has 2189 states and 5683 transitions. [2021-03-10 21:09:39,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 5683 transitions. [2021-03-10 21:09:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:39,808 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:39,809 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:40,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 21:09:40,019 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:40,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:40,019 INFO L82 PathProgramCache]: Analyzing trace with hash -11312523, now seen corresponding path program 34 times [2021-03-10 21:09:40,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:40,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276053740] [2021-03-10 21:09:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:40,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276053740] [2021-03-10 21:09:40,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802005221] [2021-03-10 21:09:40,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:40,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:40,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:40,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:40,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:40,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:40,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:09:40,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497563143] [2021-03-10 21:09:40,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:40,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:40,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:40,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:40,136 INFO L87 Difference]: Start difference. First operand 2189 states and 5683 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:40,319 INFO L93 Difference]: Finished difference Result 2443 states and 6146 transitions. [2021-03-10 21:09:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:40,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:40,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:40,321 INFO L225 Difference]: With dead ends: 2443 [2021-03-10 21:09:40,321 INFO L226 Difference]: Without dead ends: 2362 [2021-03-10 21:09:40,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-03-10 21:09:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2099. [2021-03-10 21:09:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 2.607721639656816) internal successors, (5471), 2098 states have internal predecessors, (5471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 5471 transitions. [2021-03-10 21:09:40,340 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 5471 transitions. Word has length 35 [2021-03-10 21:09:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:40,340 INFO L480 AbstractCegarLoop]: Abstraction has 2099 states and 5471 transitions. [2021-03-10 21:09:40,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 5471 transitions. [2021-03-10 21:09:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:40,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:40,341 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:40,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:40,547 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:40,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:40,547 INFO L82 PathProgramCache]: Analyzing trace with hash -624848703, now seen corresponding path program 35 times [2021-03-10 21:09:40,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:40,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251376931] [2021-03-10 21:09:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:40,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251376931] [2021-03-10 21:09:40,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379805755] [2021-03-10 21:09:40,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:40,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:09:40,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:40,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:40,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:40,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:40,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:09:40,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971240085] [2021-03-10 21:09:40,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:40,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:40,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:40,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:40,661 INFO L87 Difference]: Start difference. First operand 2099 states and 5471 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:40,811 INFO L93 Difference]: Finished difference Result 2438 states and 6164 transitions. [2021-03-10 21:09:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:40,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:40,813 INFO L225 Difference]: With dead ends: 2438 [2021-03-10 21:09:40,813 INFO L226 Difference]: Without dead ends: 2426 [2021-03-10 21:09:40,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-03-10 21:09:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2101. [2021-03-10 21:09:40,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 2.607142857142857) internal successors, (5475), 2100 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5475 transitions. [2021-03-10 21:09:40,831 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5475 transitions. Word has length 35 [2021-03-10 21:09:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:40,831 INFO L480 AbstractCegarLoop]: Abstraction has 2101 states and 5475 transitions. [2021-03-10 21:09:40,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5475 transitions. [2021-03-10 21:09:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:40,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:40,833 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:41,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-03-10 21:09:41,033 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1517068631, now seen corresponding path program 36 times [2021-03-10 21:09:41,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:41,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640620826] [2021-03-10 21:09:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:41,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640620826] [2021-03-10 21:09:41,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151060374] [2021-03-10 21:09:41,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:41,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:09:41,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:41,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:41,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:41,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:41,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:09:41,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761665754] [2021-03-10 21:09:41,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:41,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:41,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:41,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:41,153 INFO L87 Difference]: Start difference. First operand 2101 states and 5475 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:41,375 INFO L93 Difference]: Finished difference Result 3130 states and 7650 transitions. [2021-03-10 21:09:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:09:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:41,377 INFO L225 Difference]: With dead ends: 3130 [2021-03-10 21:09:41,377 INFO L226 Difference]: Without dead ends: 3076 [2021-03-10 21:09:41,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:09:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-03-10 21:09:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2160. [2021-03-10 21:09:41,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 2.607225567392311) internal successors, (5629), 2159 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 5629 transitions. [2021-03-10 21:09:41,398 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 5629 transitions. Word has length 35 [2021-03-10 21:09:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:41,398 INFO L480 AbstractCegarLoop]: Abstraction has 2160 states and 5629 transitions. [2021-03-10 21:09:41,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 5629 transitions. [2021-03-10 21:09:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:41,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:41,400 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:41,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:41,600 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:41,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1245339556, now seen corresponding path program 37 times [2021-03-10 21:09:41,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:41,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581648305] [2021-03-10 21:09:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:41,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581648305] [2021-03-10 21:09:41,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152951013] [2021-03-10 21:09:41,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:41,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:41,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:41,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:09:41,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488758082] [2021-03-10 21:09:41,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:41,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:41,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:41,703 INFO L87 Difference]: Start difference. First operand 2160 states and 5629 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:41,789 INFO L93 Difference]: Finished difference Result 2797 states and 7011 transitions. [2021-03-10 21:09:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:41,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:41,791 INFO L225 Difference]: With dead ends: 2797 [2021-03-10 21:09:41,791 INFO L226 Difference]: Without dead ends: 2779 [2021-03-10 21:09:41,791 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-03-10 21:09:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2232. [2021-03-10 21:09:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.623487225459435) internal successors, (5853), 2231 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5853 transitions. [2021-03-10 21:09:41,812 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5853 transitions. Word has length 35 [2021-03-10 21:09:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:41,812 INFO L480 AbstractCegarLoop]: Abstraction has 2232 states and 5853 transitions. [2021-03-10 21:09:41,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5853 transitions. [2021-03-10 21:09:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:41,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:41,814 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:42,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-03-10 21:09:42,015 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1671905165, now seen corresponding path program 38 times [2021-03-10 21:09:42,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:42,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103618047] [2021-03-10 21:09:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:42,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103618047] [2021-03-10 21:09:42,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969838958] [2021-03-10 21:09:42,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:42,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:42,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:42,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:42,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:42,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:42,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:09:42,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566028177] [2021-03-10 21:09:42,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:42,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:42,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:42,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:42,125 INFO L87 Difference]: Start difference. First operand 2232 states and 5853 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:42,458 INFO L93 Difference]: Finished difference Result 3892 states and 9431 transitions. [2021-03-10 21:09:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:09:42,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:42,461 INFO L225 Difference]: With dead ends: 3892 [2021-03-10 21:09:42,461 INFO L226 Difference]: Without dead ends: 3778 [2021-03-10 21:09:42,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:09:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2021-03-10 21:09:42,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 2365. [2021-03-10 21:09:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 2.6163282571912014) internal successors, (6185), 2364 states have internal predecessors, (6185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 6185 transitions. [2021-03-10 21:09:42,485 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 6185 transitions. Word has length 35 [2021-03-10 21:09:42,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:42,485 INFO L480 AbstractCegarLoop]: Abstraction has 2365 states and 6185 transitions. [2021-03-10 21:09:42,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 6185 transitions. [2021-03-10 21:09:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:42,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:42,487 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:42,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:42,687 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:42,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2058507842, now seen corresponding path program 39 times [2021-03-10 21:09:42,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:42,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182788452] [2021-03-10 21:09:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:42,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182788452] [2021-03-10 21:09:42,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365682471] [2021-03-10 21:09:42,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:42,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:09:42,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:42,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:42,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:42,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:42,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:09:42,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279928074] [2021-03-10 21:09:42,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:42,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:42,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:42,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:42,808 INFO L87 Difference]: Start difference. First operand 2365 states and 6185 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:42,901 INFO L93 Difference]: Finished difference Result 3020 states and 7504 transitions. [2021-03-10 21:09:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:42,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:42,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:42,903 INFO L225 Difference]: With dead ends: 3020 [2021-03-10 21:09:42,903 INFO L226 Difference]: Without dead ends: 2993 [2021-03-10 21:09:42,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-03-10 21:09:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2365. [2021-03-10 21:09:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 2.6150592216582065) internal successors, (6182), 2364 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 6182 transitions. [2021-03-10 21:09:42,925 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 6182 transitions. Word has length 35 [2021-03-10 21:09:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:42,925 INFO L480 AbstractCegarLoop]: Abstraction has 2365 states and 6182 transitions. [2021-03-10 21:09:42,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 6182 transitions. [2021-03-10 21:09:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:42,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:42,927 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:43,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-03-10 21:09:43,141 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:43,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:43,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1612213655, now seen corresponding path program 40 times [2021-03-10 21:09:43,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:43,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562143658] [2021-03-10 21:09:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:43,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562143658] [2021-03-10 21:09:43,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264288545] [2021-03-10 21:09:43,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:43,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:43,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:09:43,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:43,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:09:43,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-03-10 21:09:43,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:43,305 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-03-10 21:09:43,305 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:09:43,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:43,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-03-10 21:09:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:43,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:43,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 21:09:43,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45032828] [2021-03-10 21:09:43,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:09:43,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:43,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:09:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:43,312 INFO L87 Difference]: Start difference. First operand 2365 states and 6182 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:43,992 INFO L93 Difference]: Finished difference Result 5500 states and 12979 transitions. [2021-03-10 21:09:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:09:43,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:43,997 INFO L225 Difference]: With dead ends: 5500 [2021-03-10 21:09:43,997 INFO L226 Difference]: Without dead ends: 5285 [2021-03-10 21:09:43,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=319, Invalid=1843, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:09:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5285 states. [2021-03-10 21:09:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5285 to 3148. [2021-03-10 21:09:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3148 states, 3147 states have (on average 2.5951700031776297) internal successors, (8167), 3147 states have internal predecessors, (8167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 8167 transitions. [2021-03-10 21:09:44,032 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 8167 transitions. Word has length 35 [2021-03-10 21:09:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:44,032 INFO L480 AbstractCegarLoop]: Abstraction has 3148 states and 8167 transitions. [2021-03-10 21:09:44,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 8167 transitions. [2021-03-10 21:09:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:44,034 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:44,034 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:44,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-03-10 21:09:44,234 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1374152138, now seen corresponding path program 26 times [2021-03-10 21:09:44,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:44,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345061848] [2021-03-10 21:09:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:44,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345061848] [2021-03-10 21:09:44,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27794859] [2021-03-10 21:09:44,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:44,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:44,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:44,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:44,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:44,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:44,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-03-10 21:09:44,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251294478] [2021-03-10 21:09:44,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:44,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:44,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:44,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:44,334 INFO L87 Difference]: Start difference. First operand 3148 states and 8167 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:44,436 INFO L93 Difference]: Finished difference Result 3993 states and 9944 transitions. [2021-03-10 21:09:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:44,439 INFO L225 Difference]: With dead ends: 3993 [2021-03-10 21:09:44,439 INFO L226 Difference]: Without dead ends: 3985 [2021-03-10 21:09:44,440 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3985 states. [2021-03-10 21:09:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3985 to 3007. [2021-03-10 21:09:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 2.5721889554224884) internal successors, (7732), 3006 states have internal predecessors, (7732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 7732 transitions. [2021-03-10 21:09:44,480 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 7732 transitions. Word has length 35 [2021-03-10 21:09:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:44,480 INFO L480 AbstractCegarLoop]: Abstraction has 3007 states and 7732 transitions. [2021-03-10 21:09:44,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 7732 transitions. [2021-03-10 21:09:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:44,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:44,481 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:44,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:44,682 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:44,682 INFO L82 PathProgramCache]: Analyzing trace with hash 752271728, now seen corresponding path program 27 times [2021-03-10 21:09:44,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:44,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163515157] [2021-03-10 21:09:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:44,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163515157] [2021-03-10 21:09:44,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882629945] [2021-03-10 21:09:44,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:44,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:09:44,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:44,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:44,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:44,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-03-10 21:09:44,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235939381] [2021-03-10 21:09:44,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:44,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:44,800 INFO L87 Difference]: Start difference. First operand 3007 states and 7732 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:44,973 INFO L93 Difference]: Finished difference Result 3786 states and 9211 transitions. [2021-03-10 21:09:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:09:44,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:44,976 INFO L225 Difference]: With dead ends: 3786 [2021-03-10 21:09:44,977 INFO L226 Difference]: Without dead ends: 3786 [2021-03-10 21:09:44,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:09:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2021-03-10 21:09:44,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 2881. [2021-03-10 21:09:45,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 2.584722222222222) internal successors, (7444), 2880 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 7444 transitions. [2021-03-10 21:09:45,004 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 7444 transitions. Word has length 35 [2021-03-10 21:09:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:45,005 INFO L480 AbstractCegarLoop]: Abstraction has 2881 states and 7444 transitions. [2021-03-10 21:09:45,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 7444 transitions. [2021-03-10 21:09:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:09:45,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:45,006 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:45,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:45,207 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:45,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:45,207 INFO L82 PathProgramCache]: Analyzing trace with hash -789180772, now seen corresponding path program 41 times [2021-03-10 21:09:45,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:45,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687695852] [2021-03-10 21:09:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:45,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687695852] [2021-03-10 21:09:45,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61308452] [2021-03-10 21:09:45,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:45,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:09:45,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:45,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:45,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:45,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-03-10 21:09:45,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143033655] [2021-03-10 21:09:45,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:09:45,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:45,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:09:45,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:45,344 INFO L87 Difference]: Start difference. First operand 2881 states and 7444 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:45,512 INFO L93 Difference]: Finished difference Result 3453 states and 8633 transitions. [2021-03-10 21:09:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:09:45,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:09:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:45,516 INFO L225 Difference]: With dead ends: 3453 [2021-03-10 21:09:45,516 INFO L226 Difference]: Without dead ends: 3415 [2021-03-10 21:09:45,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:09:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2021-03-10 21:09:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 2890. [2021-03-10 21:09:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 2.5815160955347873) internal successors, (7458), 2889 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 7458 transitions. [2021-03-10 21:09:45,544 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 7458 transitions. Word has length 35 [2021-03-10 21:09:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:45,545 INFO L480 AbstractCegarLoop]: Abstraction has 2890 states and 7458 transitions. [2021-03-10 21:09:45,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 7458 transitions. [2021-03-10 21:09:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:09:45,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:45,547 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:45,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-10 21:09:45,761 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:45,762 INFO L82 PathProgramCache]: Analyzing trace with hash -323121403, now seen corresponding path program 42 times [2021-03-10 21:09:45,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:45,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192014892] [2021-03-10 21:09:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:45,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192014892] [2021-03-10 21:09:45,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713674591] [2021-03-10 21:09:45,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:45,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:09:45,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:09:45,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:45,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:45,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 21:09:45,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398854383] [2021-03-10 21:09:45,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:45,873 INFO L87 Difference]: Start difference. First operand 2890 states and 7458 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:45,997 INFO L93 Difference]: Finished difference Result 3737 states and 9409 transitions. [2021-03-10 21:09:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:45,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:09:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:46,000 INFO L225 Difference]: With dead ends: 3737 [2021-03-10 21:09:46,000 INFO L226 Difference]: Without dead ends: 3706 [2021-03-10 21:09:46,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-03-10 21:09:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3334. [2021-03-10 21:09:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 2.5625562556255628) internal successors, (8541), 3333 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 8541 transitions. [2021-03-10 21:09:46,030 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 8541 transitions. Word has length 38 [2021-03-10 21:09:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:46,030 INFO L480 AbstractCegarLoop]: Abstraction has 3334 states and 8541 transitions. [2021-03-10 21:09:46,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 8541 transitions. [2021-03-10 21:09:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:09:46,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:46,032 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:46,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:46,233 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash 988310311, now seen corresponding path program 43 times [2021-03-10 21:09:46,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:46,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440743823] [2021-03-10 21:09:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:09:46,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440743823] [2021-03-10 21:09:46,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5244171] [2021-03-10 21:09:46,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:46,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:09:46,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:09:46,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:46,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 21:09:46,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419512688] [2021-03-10 21:09:46,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:46,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:46,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:46,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:46,341 INFO L87 Difference]: Start difference. First operand 3334 states and 8541 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:46,478 INFO L93 Difference]: Finished difference Result 3927 states and 9822 transitions. [2021-03-10 21:09:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:09:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:46,481 INFO L225 Difference]: With dead ends: 3927 [2021-03-10 21:09:46,481 INFO L226 Difference]: Without dead ends: 3889 [2021-03-10 21:09:46,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:46,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-03-10 21:09:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3334. [2021-03-10 21:09:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 2.561056105610561) internal successors, (8536), 3333 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 8536 transitions. [2021-03-10 21:09:46,511 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 8536 transitions. Word has length 38 [2021-03-10 21:09:46,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:46,511 INFO L480 AbstractCegarLoop]: Abstraction has 3334 states and 8536 transitions. [2021-03-10 21:09:46,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 8536 transitions. [2021-03-10 21:09:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:09:46,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:46,513 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:46,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-03-10 21:09:46,713 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:46,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1650028221, now seen corresponding path program 44 times [2021-03-10 21:09:46,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:46,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592638344] [2021-03-10 21:09:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:09:46,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592638344] [2021-03-10 21:09:46,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594375148] [2021-03-10 21:09:46,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:46,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:46,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:46,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:46,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:46,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:46,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-03-10 21:09:46,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616367808] [2021-03-10 21:09:46,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:09:46,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:46,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:09:46,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:46,853 INFO L87 Difference]: Start difference. First operand 3334 states and 8536 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:47,263 INFO L93 Difference]: Finished difference Result 5262 states and 12566 transitions. [2021-03-10 21:09:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:09:47,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:09:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:47,267 INFO L225 Difference]: With dead ends: 5262 [2021-03-10 21:09:47,267 INFO L226 Difference]: Without dead ends: 5193 [2021-03-10 21:09:47,267 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:09:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5193 states. [2021-03-10 21:09:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5193 to 3398. [2021-03-10 21:09:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 3397 states have (on average 2.5578451574919048) internal successors, (8689), 3397 states have internal predecessors, (8689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 8689 transitions. [2021-03-10 21:09:47,302 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 8689 transitions. Word has length 38 [2021-03-10 21:09:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:47,302 INFO L480 AbstractCegarLoop]: Abstraction has 3398 states and 8689 transitions. [2021-03-10 21:09:47,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 8689 transitions. [2021-03-10 21:09:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:09:47,304 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:47,304 INFO L519 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:47,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:47,505 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:47,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1803249063, now seen corresponding path program 45 times [2021-03-10 21:09:47,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:47,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755222584] [2021-03-10 21:09:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:09:47,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755222584] [2021-03-10 21:09:47,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961487120] [2021-03-10 21:09:47,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:47,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:09:47,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:47,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:47,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:47,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:47,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-03-10 21:09:47,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107754392] [2021-03-10 21:09:47,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:09:47,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:47,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:09:47,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:47,659 INFO L87 Difference]: Start difference. First operand 3398 states and 8689 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:48,081 INFO L93 Difference]: Finished difference Result 5285 states and 12575 transitions. [2021-03-10 21:09:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:09:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:09:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:48,085 INFO L225 Difference]: With dead ends: 5285 [2021-03-10 21:09:48,085 INFO L226 Difference]: Without dead ends: 5214 [2021-03-10 21:09:48,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:09:48,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2021-03-10 21:09:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 3448. [2021-03-10 21:09:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3447 states have (on average 2.5497534087612417) internal successors, (8789), 3447 states have internal predecessors, (8789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 8789 transitions. [2021-03-10 21:09:48,131 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 8789 transitions. Word has length 38 [2021-03-10 21:09:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:48,131 INFO L480 AbstractCegarLoop]: Abstraction has 3448 states and 8789 transitions. [2021-03-10 21:09:48,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 8789 transitions. [2021-03-10 21:09:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:48,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:48,134 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:48,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-03-10 21:09:48,334 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash -18948875, now seen corresponding path program 46 times [2021-03-10 21:09:48,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:48,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441118123] [2021-03-10 21:09:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:48,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441118123] [2021-03-10 21:09:48,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81557616] [2021-03-10 21:09:48,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:48,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:48,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:09:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:48,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:48,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:09:48,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808297322] [2021-03-10 21:09:48,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:09:48,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:48,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:09:48,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:48,482 INFO L87 Difference]: Start difference. First operand 3448 states and 8789 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:48,706 INFO L93 Difference]: Finished difference Result 4666 states and 11427 transitions. [2021-03-10 21:09:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:09:48,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:48,710 INFO L225 Difference]: With dead ends: 4666 [2021-03-10 21:09:48,710 INFO L226 Difference]: Without dead ends: 4666 [2021-03-10 21:09:48,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:09:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-03-10 21:09:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 3588. [2021-03-10 21:09:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.5586841371619737) internal successors, (9178), 3587 states have internal predecessors, (9178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9178 transitions. [2021-03-10 21:09:48,744 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9178 transitions. Word has length 41 [2021-03-10 21:09:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:48,744 INFO L480 AbstractCegarLoop]: Abstraction has 3588 states and 9178 transitions. [2021-03-10 21:09:48,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9178 transitions. [2021-03-10 21:09:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:48,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:48,747 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:48,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:48,947 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282616, now seen corresponding path program 28 times [2021-03-10 21:09:48,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:48,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138951431] [2021-03-10 21:09:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:49,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138951431] [2021-03-10 21:09:49,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643357901] [2021-03-10 21:09:49,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:49,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:49,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:49,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:09:49,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:49,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:49,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:09:49,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262897647] [2021-03-10 21:09:49,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:09:49,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:49,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:09:49,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:49,101 INFO L87 Difference]: Start difference. First operand 3588 states and 9178 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:49,508 INFO L93 Difference]: Finished difference Result 5034 states and 12331 transitions. [2021-03-10 21:09:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:09:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:49,512 INFO L225 Difference]: With dead ends: 5034 [2021-03-10 21:09:49,512 INFO L226 Difference]: Without dead ends: 4993 [2021-03-10 21:09:49,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:09:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-03-10 21:09:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 3804. [2021-03-10 21:09:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 2.5535103865369444) internal successors, (9711), 3803 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 9711 transitions. [2021-03-10 21:09:49,547 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 9711 transitions. Word has length 41 [2021-03-10 21:09:49,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:49,547 INFO L480 AbstractCegarLoop]: Abstraction has 3804 states and 9711 transitions. [2021-03-10 21:09:49,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 9711 transitions. [2021-03-10 21:09:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:49,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:49,549 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:49,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-03-10 21:09:49,750 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:49,750 INFO L82 PathProgramCache]: Analyzing trace with hash -934319351, now seen corresponding path program 47 times [2021-03-10 21:09:49,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:49,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804130299] [2021-03-10 21:09:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:49,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804130299] [2021-03-10 21:09:49,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614114981] [2021-03-10 21:09:49,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:49,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:09:49,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:49,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:09:49,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:49,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:49,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 14 [2021-03-10 21:09:49,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920048349] [2021-03-10 21:09:49,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:09:49,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:49,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:09:49,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:49,889 INFO L87 Difference]: Start difference. First operand 3804 states and 9711 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:50,084 INFO L93 Difference]: Finished difference Result 4790 states and 11730 transitions. [2021-03-10 21:09:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:09:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:50,088 INFO L225 Difference]: With dead ends: 4790 [2021-03-10 21:09:50,088 INFO L226 Difference]: Without dead ends: 4787 [2021-03-10 21:09:50,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:09:50,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4787 states. [2021-03-10 21:09:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4787 to 3702. [2021-03-10 21:09:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3701 states have (on average 2.538232910024318) internal successors, (9394), 3701 states have internal predecessors, (9394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 9394 transitions. [2021-03-10 21:09:50,123 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 9394 transitions. Word has length 41 [2021-03-10 21:09:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:50,123 INFO L480 AbstractCegarLoop]: Abstraction has 3702 states and 9394 transitions. [2021-03-10 21:09:50,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 9394 transitions. [2021-03-10 21:09:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:50,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:50,126 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:50,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:50,326 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:50,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:50,326 INFO L82 PathProgramCache]: Analyzing trace with hash -292212969, now seen corresponding path program 48 times [2021-03-10 21:09:50,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:50,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982673686] [2021-03-10 21:09:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:50,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982673686] [2021-03-10 21:09:50,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301168886] [2021-03-10 21:09:50,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:50,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:09:50,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:50,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:09:50,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:50,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:50,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:09:50,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979982325] [2021-03-10 21:09:50,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:50,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:50,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:50,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:50,454 INFO L87 Difference]: Start difference. First operand 3702 states and 9394 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:50,576 INFO L93 Difference]: Finished difference Result 4219 states and 10531 transitions. [2021-03-10 21:09:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:50,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:50,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:50,580 INFO L225 Difference]: With dead ends: 4219 [2021-03-10 21:09:50,581 INFO L226 Difference]: Without dead ends: 4207 [2021-03-10 21:09:50,581 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4207 states. [2021-03-10 21:09:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4207 to 3702. [2021-03-10 21:09:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3701 states have (on average 2.537422318292353) internal successors, (9391), 3701 states have internal predecessors, (9391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 9391 transitions. [2021-03-10 21:09:50,620 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 9391 transitions. Word has length 41 [2021-03-10 21:09:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:50,620 INFO L480 AbstractCegarLoop]: Abstraction has 3702 states and 9391 transitions. [2021-03-10 21:09:50,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 9391 transitions. [2021-03-10 21:09:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:50,622 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:50,622 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:50,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-03-10 21:09:50,835 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:50,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1923251576, now seen corresponding path program 49 times [2021-03-10 21:09:50,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:50,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613905539] [2021-03-10 21:09:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:50,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613905539] [2021-03-10 21:09:50,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742676481] [2021-03-10 21:09:50,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:09:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:51,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:51,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 21:09:51,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062242364] [2021-03-10 21:09:51,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:09:51,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:09:51,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:51,056 INFO L87 Difference]: Start difference. First operand 3702 states and 9391 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:51,469 INFO L93 Difference]: Finished difference Result 3888 states and 9701 transitions. [2021-03-10 21:09:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:09:51,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:51,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:51,473 INFO L225 Difference]: With dead ends: 3888 [2021-03-10 21:09:51,473 INFO L226 Difference]: Without dead ends: 3766 [2021-03-10 21:09:51,473 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:51,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2021-03-10 21:09:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3680. [2021-03-10 21:09:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3679 states have (on average 2.5273172057624356) internal successors, (9298), 3679 states have internal predecessors, (9298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 9298 transitions. [2021-03-10 21:09:51,503 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 9298 transitions. Word has length 41 [2021-03-10 21:09:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:51,503 INFO L480 AbstractCegarLoop]: Abstraction has 3680 states and 9298 transitions. [2021-03-10 21:09:51,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 9298 transitions. [2021-03-10 21:09:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:51,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:51,506 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:51,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:51,706 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:51,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1073103992, now seen corresponding path program 50 times [2021-03-10 21:09:51,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:51,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905330236] [2021-03-10 21:09:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:51,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905330236] [2021-03-10 21:09:51,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881046859] [2021-03-10 21:09:51,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:51,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:51,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:51,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:09:51,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:51,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:51,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:09:51,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828872598] [2021-03-10 21:09:51,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:51,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:51,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:51,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:51,851 INFO L87 Difference]: Start difference. First operand 3680 states and 9298 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:52,004 INFO L93 Difference]: Finished difference Result 3989 states and 9911 transitions. [2021-03-10 21:09:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:09:52,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:52,008 INFO L225 Difference]: With dead ends: 3989 [2021-03-10 21:09:52,008 INFO L226 Difference]: Without dead ends: 3953 [2021-03-10 21:09:52,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2021-03-10 21:09:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 3670. [2021-03-10 21:09:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 2.5322976287816843) internal successors, (9291), 3669 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 9291 transitions. [2021-03-10 21:09:52,038 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 9291 transitions. Word has length 41 [2021-03-10 21:09:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:52,038 INFO L480 AbstractCegarLoop]: Abstraction has 3670 states and 9291 transitions. [2021-03-10 21:09:52,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 9291 transitions. [2021-03-10 21:09:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:52,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:52,041 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:52,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-10 21:09:52,242 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:52,242 INFO L82 PathProgramCache]: Analyzing trace with hash 665060437, now seen corresponding path program 29 times [2021-03-10 21:09:52,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:52,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921098363] [2021-03-10 21:09:52,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:52,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921098363] [2021-03-10 21:09:52,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220264542] [2021-03-10 21:09:52,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:52,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:09:52,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:52,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:09:52,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:52,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:52,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-03-10 21:09:52,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514580388] [2021-03-10 21:09:52,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:09:52,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:09:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:52,403 INFO L87 Difference]: Start difference. First operand 3670 states and 9291 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:52,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:52,602 INFO L93 Difference]: Finished difference Result 4996 states and 11981 transitions. [2021-03-10 21:09:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:09:52,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:52,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:52,607 INFO L225 Difference]: With dead ends: 4996 [2021-03-10 21:09:52,607 INFO L226 Difference]: Without dead ends: 4938 [2021-03-10 21:09:52,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:09:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-03-10 21:09:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 3620. [2021-03-10 21:09:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 2.492401215805471) internal successors, (9020), 3619 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9020 transitions. [2021-03-10 21:09:52,641 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9020 transitions. Word has length 41 [2021-03-10 21:09:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:52,641 INFO L480 AbstractCegarLoop]: Abstraction has 3620 states and 9020 transitions. [2021-03-10 21:09:52,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9020 transitions. [2021-03-10 21:09:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:52,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:52,644 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:52,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-03-10 21:09:52,847 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:52,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:52,847 INFO L82 PathProgramCache]: Analyzing trace with hash 9364347, now seen corresponding path program 30 times [2021-03-10 21:09:52,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:52,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789250831] [2021-03-10 21:09:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:52,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789250831] [2021-03-10 21:09:52,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386840191] [2021-03-10 21:09:52,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:52,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:09:52,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:52,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:09:52,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:53,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:53,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-03-10 21:09:53,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414482664] [2021-03-10 21:09:53,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:53,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:53,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:53,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:53,012 INFO L87 Difference]: Start difference. First operand 3620 states and 9020 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:53,152 INFO L93 Difference]: Finished difference Result 5537 states and 13349 transitions. [2021-03-10 21:09:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:53,156 INFO L225 Difference]: With dead ends: 5537 [2021-03-10 21:09:53,156 INFO L226 Difference]: Without dead ends: 5537 [2021-03-10 21:09:53,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5537 states. [2021-03-10 21:09:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5537 to 3941. [2021-03-10 21:09:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 2.5423857868020305) internal successors, (10017), 3940 states have internal predecessors, (10017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 10017 transitions. [2021-03-10 21:09:53,195 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 10017 transitions. Word has length 41 [2021-03-10 21:09:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:53,196 INFO L480 AbstractCegarLoop]: Abstraction has 3941 states and 10017 transitions. [2021-03-10 21:09:53,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 10017 transitions. [2021-03-10 21:09:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:53,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:53,198 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:53,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:53,403 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:53,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1583917210, now seen corresponding path program 31 times [2021-03-10 21:09:53,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:53,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017601611] [2021-03-10 21:09:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:53,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017601611] [2021-03-10 21:09:53,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750831539] [2021-03-10 21:09:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:53,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:09:53,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:53,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:53,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:09:53,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558335831] [2021-03-10 21:09:53,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:53,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:53,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:53,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:53,533 INFO L87 Difference]: Start difference. First operand 3941 states and 10017 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:53,728 INFO L93 Difference]: Finished difference Result 4962 states and 12162 transitions. [2021-03-10 21:09:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:09:53,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:53,733 INFO L225 Difference]: With dead ends: 4962 [2021-03-10 21:09:53,733 INFO L226 Difference]: Without dead ends: 4927 [2021-03-10 21:09:53,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2021-03-10 21:09:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 4121. [2021-03-10 21:09:53,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4121 states, 4120 states have (on average 2.536650485436893) internal successors, (10451), 4120 states have internal predecessors, (10451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 10451 transitions. [2021-03-10 21:09:53,770 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 10451 transitions. Word has length 41 [2021-03-10 21:09:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:53,770 INFO L480 AbstractCegarLoop]: Abstraction has 4121 states and 10451 transitions. [2021-03-10 21:09:53,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 10451 transitions. [2021-03-10 21:09:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:53,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:53,773 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:53,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:53,975 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:53,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1157353229, now seen corresponding path program 51 times [2021-03-10 21:09:53,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:53,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571586019] [2021-03-10 21:09:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:54,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571586019] [2021-03-10 21:09:54,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871519770] [2021-03-10 21:09:54,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:54,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:09:54,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:54,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:09:54,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:54,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:54,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 21:09:54,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386770054] [2021-03-10 21:09:54,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:54,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:54,098 INFO L87 Difference]: Start difference. First operand 4121 states and 10451 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:54,186 INFO L93 Difference]: Finished difference Result 4927 states and 12136 transitions. [2021-03-10 21:09:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:54,190 INFO L225 Difference]: With dead ends: 4927 [2021-03-10 21:09:54,190 INFO L226 Difference]: Without dead ends: 4924 [2021-03-10 21:09:54,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4924 states. [2021-03-10 21:09:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4924 to 4107. [2021-03-10 21:09:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4107 states, 4106 states have (on average 2.5331222601071604) internal successors, (10401), 4106 states have internal predecessors, (10401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4107 states to 4107 states and 10401 transitions. [2021-03-10 21:09:54,227 INFO L78 Accepts]: Start accepts. Automaton has 4107 states and 10401 transitions. Word has length 41 [2021-03-10 21:09:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:54,228 INFO L480 AbstractCegarLoop]: Abstraction has 4107 states and 10401 transitions. [2021-03-10 21:09:54,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:54,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4107 states and 10401 transitions. [2021-03-10 21:09:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:54,230 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:54,230 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:54,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-03-10 21:09:54,431 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:54,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:54,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1364415795, now seen corresponding path program 52 times [2021-03-10 21:09:54,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:54,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110186532] [2021-03-10 21:09:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:54,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110186532] [2021-03-10 21:09:54,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878702512] [2021-03-10 21:09:54,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:54,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:54,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:09:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:54,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:54,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:09:54,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714513501] [2021-03-10 21:09:54,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:54,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:54,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:54,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:54,538 INFO L87 Difference]: Start difference. First operand 4107 states and 10401 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:54,663 INFO L93 Difference]: Finished difference Result 4946 states and 12130 transitions. [2021-03-10 21:09:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:54,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:54,667 INFO L225 Difference]: With dead ends: 4946 [2021-03-10 21:09:54,667 INFO L226 Difference]: Without dead ends: 4928 [2021-03-10 21:09:54,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-03-10 21:09:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 4167. [2021-03-10 21:09:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 4166 states have (on average 2.530244839174268) internal successors, (10541), 4166 states have internal predecessors, (10541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 10541 transitions. [2021-03-10 21:09:54,705 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 10541 transitions. Word has length 41 [2021-03-10 21:09:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:54,705 INFO L480 AbstractCegarLoop]: Abstraction has 4167 states and 10541 transitions. [2021-03-10 21:09:54,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 10541 transitions. [2021-03-10 21:09:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:54,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:54,708 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:54,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:54,908 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash -83584218, now seen corresponding path program 53 times [2021-03-10 21:09:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:54,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159108007] [2021-03-10 21:09:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:54,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159108007] [2021-03-10 21:09:54,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962516494] [2021-03-10 21:09:54,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:54,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:09:54,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:09:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:55,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:55,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:09:55,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814346453] [2021-03-10 21:09:55,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:55,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:55,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:55,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:55,051 INFO L87 Difference]: Start difference. First operand 4167 states and 10541 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:55,366 INFO L93 Difference]: Finished difference Result 4659 states and 11457 transitions. [2021-03-10 21:09:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:09:55,366 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:55,370 INFO L225 Difference]: With dead ends: 4659 [2021-03-10 21:09:55,370 INFO L226 Difference]: Without dead ends: 4609 [2021-03-10 21:09:55,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4609 states. [2021-03-10 21:09:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4609 to 4133. [2021-03-10 21:09:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4132 states have (on average 2.528073572120039) internal successors, (10446), 4132 states have internal predecessors, (10446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 10446 transitions. [2021-03-10 21:09:55,416 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 10446 transitions. Word has length 41 [2021-03-10 21:09:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:55,416 INFO L480 AbstractCegarLoop]: Abstraction has 4133 states and 10446 transitions. [2021-03-10 21:09:55,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 10446 transitions. [2021-03-10 21:09:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:55,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:55,419 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:55,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-03-10 21:09:55,619 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:55,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:55,620 INFO L82 PathProgramCache]: Analyzing trace with hash -697120398, now seen corresponding path program 54 times [2021-03-10 21:09:55,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:55,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871625593] [2021-03-10 21:09:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:09:55,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871625593] [2021-03-10 21:09:55,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137729942] [2021-03-10 21:09:55,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:55,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:09:55,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:55,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:09:55,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:55,838 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 21:09:55,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-03-10 21:09:55,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:55,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:55,845 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:09:55,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:55,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-03-10 21:09:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:55,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:55,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-03-10 21:09:55,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014650294] [2021-03-10 21:09:55,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:09:55,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:55,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:09:55,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:09:55,866 INFO L87 Difference]: Start difference. First operand 4133 states and 10446 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:57,462 INFO L93 Difference]: Finished difference Result 6719 states and 15891 transitions. [2021-03-10 21:09:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 21:09:57,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:57,468 INFO L225 Difference]: With dead ends: 6719 [2021-03-10 21:09:57,468 INFO L226 Difference]: Without dead ends: 6662 [2021-03-10 21:09:57,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 1105.4ms TimeCoverageRelationStatistics Valid=1121, Invalid=5359, Unknown=0, NotChecked=0, Total=6480 [2021-03-10 21:09:57,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2021-03-10 21:09:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4250. [2021-03-10 21:09:57,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 2.537773593786773) internal successors, (10783), 4249 states have internal predecessors, (10783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 10783 transitions. [2021-03-10 21:09:57,515 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 10783 transitions. Word has length 41 [2021-03-10 21:09:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:57,515 INFO L480 AbstractCegarLoop]: Abstraction has 4250 states and 10783 transitions. [2021-03-10 21:09:57,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 10783 transitions. [2021-03-10 21:09:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:57,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:57,518 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:57,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-03-10 21:09:57,718 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1444796936, now seen corresponding path program 55 times [2021-03-10 21:09:57,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:57,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013678073] [2021-03-10 21:09:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:57,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013678073] [2021-03-10 21:09:57,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386329063] [2021-03-10 21:09:57,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:09:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:57,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:57,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:09:57,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288849243] [2021-03-10 21:09:57,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:57,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:57,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:57,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:57,855 INFO L87 Difference]: Start difference. First operand 4250 states and 10783 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:58,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:58,129 INFO L93 Difference]: Finished difference Result 5227 states and 12758 transitions. [2021-03-10 21:09:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:09:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:58,134 INFO L225 Difference]: With dead ends: 5227 [2021-03-10 21:09:58,134 INFO L226 Difference]: Without dead ends: 5215 [2021-03-10 21:09:58,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:09:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2021-03-10 21:09:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 4278. [2021-03-10 21:09:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4278 states, 4277 states have (on average 2.5365910685059623) internal successors, (10849), 4277 states have internal predecessors, (10849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4278 states to 4278 states and 10849 transitions. [2021-03-10 21:09:58,178 INFO L78 Accepts]: Start accepts. Automaton has 4278 states and 10849 transitions. Word has length 41 [2021-03-10 21:09:58,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:58,179 INFO L480 AbstractCegarLoop]: Abstraction has 4278 states and 10849 transitions. [2021-03-10 21:09:58,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4278 states and 10849 transitions. [2021-03-10 21:09:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:58,182 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:58,182 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:58,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-03-10 21:09:58,382 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:58,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1206735419, now seen corresponding path program 32 times [2021-03-10 21:09:58,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:58,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571860662] [2021-03-10 21:09:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:58,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571860662] [2021-03-10 21:09:58,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680444712] [2021-03-10 21:09:58,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:58,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:58,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:09:58,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:58,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:58,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-03-10 21:09:58,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261375962] [2021-03-10 21:09:58,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:58,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:58,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:58,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:58,497 INFO L87 Difference]: Start difference. First operand 4278 states and 10849 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:58,627 INFO L93 Difference]: Finished difference Result 5666 states and 13760 transitions. [2021-03-10 21:09:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:58,632 INFO L225 Difference]: With dead ends: 5666 [2021-03-10 21:09:58,632 INFO L226 Difference]: Without dead ends: 5658 [2021-03-10 21:09:58,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5658 states. [2021-03-10 21:09:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5658 to 4407. [2021-03-10 21:09:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4406 states have (on average 2.550385837494326) internal successors, (11237), 4406 states have internal predecessors, (11237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 11237 transitions. [2021-03-10 21:09:58,675 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 11237 transitions. Word has length 41 [2021-03-10 21:09:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:58,675 INFO L480 AbstractCegarLoop]: Abstraction has 4407 states and 11237 transitions. [2021-03-10 21:09:58,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 11237 transitions. [2021-03-10 21:09:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:58,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:58,678 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:58,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-03-10 21:09:58,878 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:58,879 INFO L82 PathProgramCache]: Analyzing trace with hash 584855009, now seen corresponding path program 33 times [2021-03-10 21:09:58,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:58,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656920483] [2021-03-10 21:09:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:58,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656920483] [2021-03-10 21:09:58,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916614327] [2021-03-10 21:09:58,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:58,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:09:58,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:58,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:09:58,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:58,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:58,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-03-10 21:09:58,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229459393] [2021-03-10 21:09:58,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:58,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:58,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:58,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:58,997 INFO L87 Difference]: Start difference. First operand 4407 states and 11237 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:59,125 INFO L93 Difference]: Finished difference Result 6276 states and 15174 transitions. [2021-03-10 21:09:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:59,130 INFO L225 Difference]: With dead ends: 6276 [2021-03-10 21:09:59,130 INFO L226 Difference]: Without dead ends: 6276 [2021-03-10 21:09:59,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6276 states. [2021-03-10 21:09:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6276 to 4410. [2021-03-10 21:09:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4410 states, 4409 states have (on average 2.5502381492401907) internal successors, (11244), 4409 states have internal predecessors, (11244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4410 states to 4410 states and 11244 transitions. [2021-03-10 21:09:59,194 INFO L78 Accepts]: Start accepts. Automaton has 4410 states and 11244 transitions. Word has length 41 [2021-03-10 21:09:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:59,194 INFO L480 AbstractCegarLoop]: Abstraction has 4410 states and 11244 transitions. [2021-03-10 21:09:59,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4410 states and 11244 transitions. [2021-03-10 21:09:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:59,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:59,197 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:59,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-03-10 21:09:59,397 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:59,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1052717447, now seen corresponding path program 34 times [2021-03-10 21:09:59,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:59,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568198652] [2021-03-10 21:09:59,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:59,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568198652] [2021-03-10 21:09:59,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820865266] [2021-03-10 21:09:59,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:59,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:59,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:59,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:09:59,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:59,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:59,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:09:59,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475285223] [2021-03-10 21:09:59,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:59,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:59,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:59,544 INFO L87 Difference]: Start difference. First operand 4410 states and 11244 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:59,712 INFO L93 Difference]: Finished difference Result 5872 states and 14224 transitions. [2021-03-10 21:09:59,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:09:59,712 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:09:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:59,717 INFO L225 Difference]: With dead ends: 5872 [2021-03-10 21:09:59,717 INFO L226 Difference]: Without dead ends: 5872 [2021-03-10 21:09:59,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-03-10 21:09:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 4293. [2021-03-10 21:09:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 2.544501397949674) internal successors, (10921), 4292 states have internal predecessors, (10921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 10921 transitions. [2021-03-10 21:09:59,759 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 10921 transitions. Word has length 41 [2021-03-10 21:09:59,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:59,759 INFO L480 AbstractCegarLoop]: Abstraction has 4293 states and 10921 transitions. [2021-03-10 21:09:59,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 10921 transitions. [2021-03-10 21:09:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:09:59,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:59,762 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:59,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-03-10 21:09:59,962 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:59,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1317611251, now seen corresponding path program 56 times [2021-03-10 21:09:59,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:59,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360121619] [2021-03-10 21:09:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:00,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360121619] [2021-03-10 21:10:00,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826585755] [2021-03-10 21:10:00,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:00,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:00,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:00,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:00,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:00,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:00,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:10:00,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923323317] [2021-03-10 21:10:00,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:00,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:00,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:00,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:00,094 INFO L87 Difference]: Start difference. First operand 4293 states and 10921 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:00,190 INFO L93 Difference]: Finished difference Result 4868 states and 12082 transitions. [2021-03-10 21:10:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:10:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:00,195 INFO L225 Difference]: With dead ends: 4868 [2021-03-10 21:10:00,195 INFO L226 Difference]: Without dead ends: 4850 [2021-03-10 21:10:00,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2021-03-10 21:10:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4291. [2021-03-10 21:10:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4291 states, 4290 states have (on average 2.5426573426573427) internal successors, (10908), 4290 states have internal predecessors, (10908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 10908 transitions. [2021-03-10 21:10:00,235 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 10908 transitions. Word has length 41 [2021-03-10 21:10:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:00,235 INFO L480 AbstractCegarLoop]: Abstraction has 4291 states and 10908 transitions. [2021-03-10 21:10:00,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 10908 transitions. [2021-03-10 21:10:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:00,238 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:00,238 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:00,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-03-10 21:10:00,439 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:00,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:00,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1869360074, now seen corresponding path program 35 times [2021-03-10 21:10:00,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:00,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698486439] [2021-03-10 21:10:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:00,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698486439] [2021-03-10 21:10:00,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220281666] [2021-03-10 21:10:00,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:00,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:10:00,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:00,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:00,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:00,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:00,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:10:00,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990185593] [2021-03-10 21:10:00,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:00,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:00,569 INFO L87 Difference]: Start difference. First operand 4291 states and 10908 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:00,823 INFO L93 Difference]: Finished difference Result 5268 states and 12954 transitions. [2021-03-10 21:10:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:00,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:00,828 INFO L225 Difference]: With dead ends: 5268 [2021-03-10 21:10:00,828 INFO L226 Difference]: Without dead ends: 5243 [2021-03-10 21:10:00,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5243 states. [2021-03-10 21:10:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5243 to 4443. [2021-03-10 21:10:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4442 states have (on average 2.5380459252588925) internal successors, (11274), 4442 states have internal predecessors, (11274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 11274 transitions. [2021-03-10 21:10:00,876 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 11274 transitions. Word has length 41 [2021-03-10 21:10:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:00,876 INFO L480 AbstractCegarLoop]: Abstraction has 4443 states and 11274 transitions. [2021-03-10 21:10:00,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:00,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 11274 transitions. [2021-03-10 21:10:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:00,879 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:00,880 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:01,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:01,080 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash -925274230, now seen corresponding path program 57 times [2021-03-10 21:10:01,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:01,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799120530] [2021-03-10 21:10:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:01,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799120530] [2021-03-10 21:10:01,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029586925] [2021-03-10 21:10:01,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:01,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:10:01,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:01,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:01,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:01,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:01,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:10:01,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925549021] [2021-03-10 21:10:01,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:01,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:01,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:01,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:01,236 INFO L87 Difference]: Start difference. First operand 4443 states and 11274 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:01,532 INFO L93 Difference]: Finished difference Result 4967 states and 12253 transitions. [2021-03-10 21:10:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:01,536 INFO L225 Difference]: With dead ends: 4967 [2021-03-10 21:10:01,537 INFO L226 Difference]: Without dead ends: 4899 [2021-03-10 21:10:01,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-03-10 21:10:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4406. [2021-03-10 21:10:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 4405 states have (on average 2.53416572077185) internal successors, (11163), 4405 states have internal predecessors, (11163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 11163 transitions. [2021-03-10 21:10:01,577 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 11163 transitions. Word has length 41 [2021-03-10 21:10:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:01,577 INFO L480 AbstractCegarLoop]: Abstraction has 4406 states and 11163 transitions. [2021-03-10 21:10:01,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 11163 transitions. [2021-03-10 21:10:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:01,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:01,580 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:01,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-03-10 21:10:01,781 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:01,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:01,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1538810410, now seen corresponding path program 58 times [2021-03-10 21:10:01,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:01,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604011956] [2021-03-10 21:10:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:01,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604011956] [2021-03-10 21:10:01,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045529684] [2021-03-10 21:10:01,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:01,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:01,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:01,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:01,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:01,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:01,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:10:01,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484032098] [2021-03-10 21:10:01,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:01,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:01,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:01,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:01,926 INFO L87 Difference]: Start difference. First operand 4406 states and 11163 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:02,185 INFO L93 Difference]: Finished difference Result 5195 states and 12754 transitions. [2021-03-10 21:10:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:02,191 INFO L225 Difference]: With dead ends: 5195 [2021-03-10 21:10:02,191 INFO L226 Difference]: Without dead ends: 5147 [2021-03-10 21:10:02,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2021-03-10 21:10:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 4329. [2021-03-10 21:10:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4329 states, 4328 states have (on average 2.5355822550831792) internal successors, (10974), 4328 states have internal predecessors, (10974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4329 states to 4329 states and 10974 transitions. [2021-03-10 21:10:02,236 INFO L78 Accepts]: Start accepts. Automaton has 4329 states and 10974 transitions. Word has length 41 [2021-03-10 21:10:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:02,236 INFO L480 AbstractCegarLoop]: Abstraction has 4329 states and 10974 transitions. [2021-03-10 21:10:02,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 4329 states and 10974 transitions. [2021-03-10 21:10:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:02,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:02,239 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:02,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-03-10 21:10:02,447 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:02,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:02,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1696109897, now seen corresponding path program 36 times [2021-03-10 21:10:02,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:02,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234926271] [2021-03-10 21:10:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:02,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234926271] [2021-03-10 21:10:02,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059989835] [2021-03-10 21:10:02,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:10:02,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:10:02,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:02,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:02,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:02,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-03-10 21:10:02,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609678184] [2021-03-10 21:10:02,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:02,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:02,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:02,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:02,670 INFO L87 Difference]: Start difference. First operand 4329 states and 10974 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:02,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:02,852 INFO L93 Difference]: Finished difference Result 5388 states and 13139 transitions. [2021-03-10 21:10:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:02,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:02,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:02,858 INFO L225 Difference]: With dead ends: 5388 [2021-03-10 21:10:02,858 INFO L226 Difference]: Without dead ends: 5378 [2021-03-10 21:10:02,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5378 states. [2021-03-10 21:10:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5378 to 4436. [2021-03-10 21:10:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 2.537542277339346) internal successors, (11254), 4435 states have internal predecessors, (11254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 11254 transitions. [2021-03-10 21:10:02,906 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 11254 transitions. Word has length 41 [2021-03-10 21:10:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:02,906 INFO L480 AbstractCegarLoop]: Abstraction has 4436 states and 11254 transitions. [2021-03-10 21:10:02,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 11254 transitions. [2021-03-10 21:10:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:02,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:02,910 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:03,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-03-10 21:10:03,123 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:03,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1107799383, now seen corresponding path program 59 times [2021-03-10 21:10:03,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:03,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996906844] [2021-03-10 21:10:03,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:03,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996906844] [2021-03-10 21:10:03,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946617094] [2021-03-10 21:10:03,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:03,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:10:03,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:03,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:03,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:03,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:03,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-03-10 21:10:03,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162157147] [2021-03-10 21:10:03,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:10:03,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:10:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:03,286 INFO L87 Difference]: Start difference. First operand 4436 states and 11254 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:03,500 INFO L93 Difference]: Finished difference Result 5484 states and 13376 transitions. [2021-03-10 21:10:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:03,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:03,506 INFO L225 Difference]: With dead ends: 5484 [2021-03-10 21:10:03,506 INFO L226 Difference]: Without dead ends: 5466 [2021-03-10 21:10:03,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:03,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2021-03-10 21:10:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 4444. [2021-03-10 21:10:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 2.533423362592843) internal successors, (11256), 4443 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 11256 transitions. [2021-03-10 21:10:03,555 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 11256 transitions. Word has length 41 [2021-03-10 21:10:03,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:03,555 INFO L480 AbstractCegarLoop]: Abstraction has 4444 states and 11256 transitions. [2021-03-10 21:10:03,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 11256 transitions. [2021-03-10 21:10:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:03,592 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:03,592 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:03,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:03,806 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:03,806 INFO L82 PathProgramCache]: Analyzing trace with hash 603106924, now seen corresponding path program 60 times [2021-03-10 21:10:03,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:03,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120419606] [2021-03-10 21:10:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:03,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120419606] [2021-03-10 21:10:03,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709888883] [2021-03-10 21:10:03,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:03,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:10:03,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:03,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:03,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:03,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:10:03,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373746130] [2021-03-10 21:10:03,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:03,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:03,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:03,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:03,959 INFO L87 Difference]: Start difference. First operand 4444 states and 11256 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:04,297 INFO L93 Difference]: Finished difference Result 5908 states and 14304 transitions. [2021-03-10 21:10:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:10:04,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:04,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:04,303 INFO L225 Difference]: With dead ends: 5908 [2021-03-10 21:10:04,303 INFO L226 Difference]: Without dead ends: 5866 [2021-03-10 21:10:04,303 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:10:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2021-03-10 21:10:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 4459. [2021-03-10 21:10:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4458 states have (on average 2.5345446388515027) internal successors, (11299), 4458 states have internal predecessors, (11299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 11299 transitions. [2021-03-10 21:10:04,347 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 11299 transitions. Word has length 41 [2021-03-10 21:10:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:04,347 INFO L480 AbstractCegarLoop]: Abstraction has 4459 states and 11299 transitions. [2021-03-10 21:10:04,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:04,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 11299 transitions. [2021-03-10 21:10:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:04,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:04,350 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:04,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:04,551 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:04,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2135666033, now seen corresponding path program 61 times [2021-03-10 21:10:04,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:04,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442530394] [2021-03-10 21:10:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:04,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442530394] [2021-03-10 21:10:04,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104061859] [2021-03-10 21:10:04,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:04,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:04,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:04,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:04,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:10:04,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448708105] [2021-03-10 21:10:04,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:04,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:04,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:04,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:04,687 INFO L87 Difference]: Start difference. First operand 4459 states and 11299 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:04,813 INFO L93 Difference]: Finished difference Result 5392 states and 13152 transitions. [2021-03-10 21:10:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:10:04,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:04,818 INFO L225 Difference]: With dead ends: 5392 [2021-03-10 21:10:04,818 INFO L226 Difference]: Without dead ends: 5368 [2021-03-10 21:10:04,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:04,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2021-03-10 21:10:04,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 4459. [2021-03-10 21:10:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4458 states have (on average 2.5329744279946165) internal successors, (11292), 4458 states have internal predecessors, (11292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 11292 transitions. [2021-03-10 21:10:04,861 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 11292 transitions. Word has length 41 [2021-03-10 21:10:04,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:04,862 INFO L480 AbstractCegarLoop]: Abstraction has 4459 states and 11292 transitions. [2021-03-10 21:10:04,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 11292 transitions. [2021-03-10 21:10:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:04,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:04,865 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:05,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:05,065 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 757943458, now seen corresponding path program 62 times [2021-03-10 21:10:05,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:05,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057794884] [2021-03-10 21:10:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:05,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057794884] [2021-03-10 21:10:05,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168487551] [2021-03-10 21:10:05,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:05,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:05,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:05,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:05,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:10:05,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687808422] [2021-03-10 21:10:05,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:05,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:05,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:05,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:05,197 INFO L87 Difference]: Start difference. First operand 4459 states and 11292 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:05,519 INFO L93 Difference]: Finished difference Result 5882 states and 14163 transitions. [2021-03-10 21:10:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:10:05,521 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:05,527 INFO L225 Difference]: With dead ends: 5882 [2021-03-10 21:10:05,527 INFO L226 Difference]: Without dead ends: 5828 [2021-03-10 21:10:05,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:10:05,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-03-10 21:10:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4455. [2021-03-10 21:10:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 4454 states have (on average 2.5280646609788953) internal successors, (11260), 4454 states have internal predecessors, (11260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 11260 transitions. [2021-03-10 21:10:05,571 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 11260 transitions. Word has length 41 [2021-03-10 21:10:05,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:05,571 INFO L480 AbstractCegarLoop]: Abstraction has 4455 states and 11260 transitions. [2021-03-10 21:10:05,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 11260 transitions. [2021-03-10 21:10:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:05,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:05,574 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:05,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-03-10 21:10:05,774 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:05,775 INFO L82 PathProgramCache]: Analyzing trace with hash -101998469, now seen corresponding path program 37 times [2021-03-10 21:10:05,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:05,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479749960] [2021-03-10 21:10:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:05,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479749960] [2021-03-10 21:10:05,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937635775] [2021-03-10 21:10:05,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:05,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:05,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-03-10 21:10:05,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265957306] [2021-03-10 21:10:05,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:05,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:05,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:05,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:05,890 INFO L87 Difference]: Start difference. First operand 4455 states and 11260 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:06,051 INFO L93 Difference]: Finished difference Result 6622 states and 15953 transitions. [2021-03-10 21:10:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:06,052 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:06,057 INFO L225 Difference]: With dead ends: 6622 [2021-03-10 21:10:06,057 INFO L226 Difference]: Without dead ends: 6622 [2021-03-10 21:10:06,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6622 states. [2021-03-10 21:10:06,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6622 to 4536. [2021-03-10 21:10:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4536 states, 4535 states have (on average 2.5371554575523705) internal successors, (11506), 4535 states have internal predecessors, (11506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 11506 transitions. [2021-03-10 21:10:06,105 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 11506 transitions. Word has length 41 [2021-03-10 21:10:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:06,105 INFO L480 AbstractCegarLoop]: Abstraction has 4536 states and 11506 transitions. [2021-03-10 21:10:06,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 11506 transitions. [2021-03-10 21:10:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:06,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:06,108 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:06,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:06,309 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:06,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1739570925, now seen corresponding path program 38 times [2021-03-10 21:10:06,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:06,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071663973] [2021-03-10 21:10:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071663973] [2021-03-10 21:10:06,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267415550] [2021-03-10 21:10:06,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:06,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:06,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:06,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:06,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:10:06,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206665387] [2021-03-10 21:10:06,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:06,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:06,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:06,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:06,428 INFO L87 Difference]: Start difference. First operand 4536 states and 11506 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:06,623 INFO L93 Difference]: Finished difference Result 6538 states and 15763 transitions. [2021-03-10 21:10:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:06,628 INFO L225 Difference]: With dead ends: 6538 [2021-03-10 21:10:06,629 INFO L226 Difference]: Without dead ends: 6538 [2021-03-10 21:10:06,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:10:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2021-03-10 21:10:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 4548. [2021-03-10 21:10:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.538157026610952) internal successors, (11541), 4547 states have internal predecessors, (11541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 11541 transitions. [2021-03-10 21:10:06,676 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 11541 transitions. Word has length 41 [2021-03-10 21:10:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:06,676 INFO L480 AbstractCegarLoop]: Abstraction has 4548 states and 11541 transitions. [2021-03-10 21:10:06,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 11541 transitions. [2021-03-10 21:10:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:06,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:06,679 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:06,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-03-10 21:10:06,880 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:06,880 INFO L82 PathProgramCache]: Analyzing trace with hash 865401207, now seen corresponding path program 39 times [2021-03-10 21:10:06,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:06,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702858786] [2021-03-10 21:10:06,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:06,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702858786] [2021-03-10 21:10:06,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317974579] [2021-03-10 21:10:06,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:06,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:10:06,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:06,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:07,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:07,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:10:07,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823090989] [2021-03-10 21:10:07,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:10:07,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:07,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:10:07,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:07,034 INFO L87 Difference]: Start difference. First operand 4548 states and 11541 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:07,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:07,247 INFO L93 Difference]: Finished difference Result 5919 states and 14307 transitions. [2021-03-10 21:10:07,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:07,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:07,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:07,253 INFO L225 Difference]: With dead ends: 5919 [2021-03-10 21:10:07,253 INFO L226 Difference]: Without dead ends: 5919 [2021-03-10 21:10:07,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:10:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2021-03-10 21:10:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 4381. [2021-03-10 21:10:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4380 states have (on average 2.534703196347032) internal successors, (11102), 4380 states have internal predecessors, (11102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 11102 transitions. [2021-03-10 21:10:07,298 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 11102 transitions. Word has length 41 [2021-03-10 21:10:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:07,299 INFO L480 AbstractCegarLoop]: Abstraction has 4381 states and 11102 transitions. [2021-03-10 21:10:07,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 11102 transitions. [2021-03-10 21:10:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:07,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:07,302 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:07,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:07,502 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:07,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:07,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1144546135, now seen corresponding path program 63 times [2021-03-10 21:10:07,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:07,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848352232] [2021-03-10 21:10:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:07,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848352232] [2021-03-10 21:10:07,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119831442] [2021-03-10 21:10:07,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:07,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:10:07,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:07,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:07,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:07,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:10:07,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354371452] [2021-03-10 21:10:07,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:07,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:07,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:07,630 INFO L87 Difference]: Start difference. First operand 4381 states and 11102 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:07,785 INFO L93 Difference]: Finished difference Result 5144 states and 12650 transitions. [2021-03-10 21:10:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:07,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:07,789 INFO L225 Difference]: With dead ends: 5144 [2021-03-10 21:10:07,789 INFO L226 Difference]: Without dead ends: 5117 [2021-03-10 21:10:07,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:07,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-03-10 21:10:07,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4381. [2021-03-10 21:10:07,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4380 states have (on average 2.5340182648401828) internal successors, (11099), 4380 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 11099 transitions. [2021-03-10 21:10:07,832 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 11099 transitions. Word has length 41 [2021-03-10 21:10:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:07,832 INFO L480 AbstractCegarLoop]: Abstraction has 4381 states and 11099 transitions. [2021-03-10 21:10:07,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 11099 transitions. [2021-03-10 21:10:07,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:07,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:07,835 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:08,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:08,036 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:08,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1101286630, now seen corresponding path program 40 times [2021-03-10 21:10:08,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:08,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927960733] [2021-03-10 21:10:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927960733] [2021-03-10 21:10:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026702503] [2021-03-10 21:10:08,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:08,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:08,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:08,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:08,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:08,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:08,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:10:08,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855823286] [2021-03-10 21:10:08,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:08,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:08,200 INFO L87 Difference]: Start difference. First operand 4381 states and 11099 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:08,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:08,413 INFO L93 Difference]: Finished difference Result 5170 states and 12730 transitions. [2021-03-10 21:10:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:08,418 INFO L225 Difference]: With dead ends: 5170 [2021-03-10 21:10:08,418 INFO L226 Difference]: Without dead ends: 5153 [2021-03-10 21:10:08,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5153 states. [2021-03-10 21:10:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5153 to 4488. [2021-03-10 21:10:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.529529752618676) internal successors, (11350), 4487 states have internal predecessors, (11350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 11350 transitions. [2021-03-10 21:10:08,471 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 11350 transitions. Word has length 41 [2021-03-10 21:10:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:08,471 INFO L480 AbstractCegarLoop]: Abstraction has 4488 states and 11350 transitions. [2021-03-10 21:10:08,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 11350 transitions. [2021-03-10 21:10:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:08,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:08,474 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:08,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-03-10 21:10:08,675 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:08,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1693347674, now seen corresponding path program 64 times [2021-03-10 21:10:08,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:08,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060136552] [2021-03-10 21:10:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:08,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060136552] [2021-03-10 21:10:08,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103877] [2021-03-10 21:10:08,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:08,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:08,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:08,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:08,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:08,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:10:08,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960637365] [2021-03-10 21:10:08,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:08,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:08,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:08,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:08,820 INFO L87 Difference]: Start difference. First operand 4488 states and 11350 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:09,111 INFO L93 Difference]: Finished difference Result 4951 states and 12203 transitions. [2021-03-10 21:10:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:09,111 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:09,115 INFO L225 Difference]: With dead ends: 4951 [2021-03-10 21:10:09,115 INFO L226 Difference]: Without dead ends: 4875 [2021-03-10 21:10:09,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2021-03-10 21:10:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4436. [2021-03-10 21:10:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 2.5244644870349493) internal successors, (11196), 4435 states have internal predecessors, (11196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 11196 transitions. [2021-03-10 21:10:09,157 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 11196 transitions. Word has length 41 [2021-03-10 21:10:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:09,157 INFO L480 AbstractCegarLoop]: Abstraction has 4436 states and 11196 transitions. [2021-03-10 21:10:09,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 11196 transitions. [2021-03-10 21:10:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:09,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:09,160 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:09,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-03-10 21:10:09,363 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:09,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1988083442, now seen corresponding path program 65 times [2021-03-10 21:10:09,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:09,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056322637] [2021-03-10 21:10:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:09,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056322637] [2021-03-10 21:10:09,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482373436] [2021-03-10 21:10:09,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:09,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:10:09,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:09,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:09,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:09,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:09,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:10:09,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960928424] [2021-03-10 21:10:09,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:09,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:09,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:09,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:09,505 INFO L87 Difference]: Start difference. First operand 4436 states and 11196 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:09,730 INFO L93 Difference]: Finished difference Result 5233 states and 12818 transitions. [2021-03-10 21:10:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:09,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:09,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:09,735 INFO L225 Difference]: With dead ends: 5233 [2021-03-10 21:10:09,735 INFO L226 Difference]: Without dead ends: 5188 [2021-03-10 21:10:09,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5188 states. [2021-03-10 21:10:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5188 to 4448. [2021-03-10 21:10:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 4447 states have (on average 2.5243984708792446) internal successors, (11226), 4447 states have internal predecessors, (11226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 11226 transitions. [2021-03-10 21:10:09,779 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 11226 transitions. Word has length 41 [2021-03-10 21:10:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:09,779 INFO L480 AbstractCegarLoop]: Abstraction has 4448 states and 11226 transitions. [2021-03-10 21:10:09,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 11226 transitions. [2021-03-10 21:10:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:09,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:09,783 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:09,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-03-10 21:10:09,985 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash 339725939, now seen corresponding path program 66 times [2021-03-10 21:10:09,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:09,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688350798] [2021-03-10 21:10:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:10,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688350798] [2021-03-10 21:10:10,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033500822] [2021-03-10 21:10:10,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:10,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:10:10,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:10,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:10,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:10,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:10,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:10:10,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258125188] [2021-03-10 21:10:10,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:10,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:10,110 INFO L87 Difference]: Start difference. First operand 4448 states and 11226 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:10,261 INFO L93 Difference]: Finished difference Result 5463 states and 13252 transitions. [2021-03-10 21:10:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:10:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:10,265 INFO L225 Difference]: With dead ends: 5463 [2021-03-10 21:10:10,265 INFO L226 Difference]: Without dead ends: 5445 [2021-03-10 21:10:10,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-03-10 21:10:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 4426. [2021-03-10 21:10:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 2.5218079096045196) internal successors, (11159), 4425 states have internal predecessors, (11159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 11159 transitions. [2021-03-10 21:10:10,309 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 11159 transitions. Word has length 41 [2021-03-10 21:10:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:10,309 INFO L480 AbstractCegarLoop]: Abstraction has 4426 states and 11159 transitions. [2021-03-10 21:10:10,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 11159 transitions. [2021-03-10 21:10:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:10,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:10,312 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:10,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:10,513 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:10,513 INFO L82 PathProgramCache]: Analyzing trace with hash -164966520, now seen corresponding path program 67 times [2021-03-10 21:10:10,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:10,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833554591] [2021-03-10 21:10:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:10,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833554591] [2021-03-10 21:10:10,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906518435] [2021-03-10 21:10:10,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:10,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:10,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:10,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:10,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:10:10,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321533413] [2021-03-10 21:10:10,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:10,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:10,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:10,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:10,650 INFO L87 Difference]: Start difference. First operand 4426 states and 11159 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:11,024 INFO L93 Difference]: Finished difference Result 6191 states and 14900 transitions. [2021-03-10 21:10:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:10:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:11,030 INFO L225 Difference]: With dead ends: 6191 [2021-03-10 21:10:11,030 INFO L226 Difference]: Without dead ends: 6137 [2021-03-10 21:10:11,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:10:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6137 states. [2021-03-10 21:10:11,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6137 to 4522. [2021-03-10 21:10:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 2.5255474452554743) internal successors, (11418), 4521 states have internal predecessors, (11418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 11418 transitions. [2021-03-10 21:10:11,078 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 11418 transitions. Word has length 41 [2021-03-10 21:10:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:11,078 INFO L480 AbstractCegarLoop]: Abstraction has 4522 states and 11418 transitions. [2021-03-10 21:10:11,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 11418 transitions. [2021-03-10 21:10:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:11,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:11,081 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:11,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:11,282 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:11,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1367592589, now seen corresponding path program 68 times [2021-03-10 21:10:11,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:11,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145064090] [2021-03-10 21:10:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:11,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145064090] [2021-03-10 21:10:11,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629899446] [2021-03-10 21:10:11,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:11,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:11,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:11,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:11,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:11,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:11,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:10:11,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139363420] [2021-03-10 21:10:11,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:11,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:11,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:11,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:11,400 INFO L87 Difference]: Start difference. First operand 4522 states and 11418 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:11,516 INFO L93 Difference]: Finished difference Result 5612 states and 13602 transitions. [2021-03-10 21:10:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:10:11,516 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:11,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:11,521 INFO L225 Difference]: With dead ends: 5612 [2021-03-10 21:10:11,521 INFO L226 Difference]: Without dead ends: 5588 [2021-03-10 21:10:11,521 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2021-03-10 21:10:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 4522. [2021-03-10 21:10:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 2.5233355452333552) internal successors, (11408), 4521 states have internal predecessors, (11408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 11408 transitions. [2021-03-10 21:10:11,564 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 11408 transitions. Word has length 41 [2021-03-10 21:10:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:11,564 INFO L480 AbstractCegarLoop]: Abstraction has 4522 states and 11408 transitions. [2021-03-10 21:10:11,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 11408 transitions. [2021-03-10 21:10:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:11,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:11,567 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:11,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:11,768 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:11,768 INFO L82 PathProgramCache]: Analyzing trace with hash -10129986, now seen corresponding path program 69 times [2021-03-10 21:10:11,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:11,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158815541] [2021-03-10 21:10:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:11,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158815541] [2021-03-10 21:10:11,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301683388] [2021-03-10 21:10:11,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:11,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:10:11,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:11,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:11,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:11,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:11,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:10:11,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485582292] [2021-03-10 21:10:11,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:11,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:11,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:11,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:11,931 INFO L87 Difference]: Start difference. First operand 4522 states and 11408 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:12,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:12,418 INFO L93 Difference]: Finished difference Result 7541 states and 17918 transitions. [2021-03-10 21:10:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:10:12,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:12,425 INFO L225 Difference]: With dead ends: 7541 [2021-03-10 21:10:12,425 INFO L226 Difference]: Without dead ends: 7427 [2021-03-10 21:10:12,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:10:12,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7427 states. [2021-03-10 21:10:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7427 to 4631. [2021-03-10 21:10:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 2.5280777537796975) internal successors, (11705), 4630 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 11705 transitions. [2021-03-10 21:10:12,477 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 11705 transitions. Word has length 41 [2021-03-10 21:10:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:12,477 INFO L480 AbstractCegarLoop]: Abstraction has 4631 states and 11705 transitions. [2021-03-10 21:10:12,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 11705 transitions. [2021-03-10 21:10:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:12,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:12,480 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:12,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-03-10 21:10:12,681 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash 376472691, now seen corresponding path program 70 times [2021-03-10 21:10:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:12,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162638326] [2021-03-10 21:10:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:12,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162638326] [2021-03-10 21:10:12,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776155102] [2021-03-10 21:10:12,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:12,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:12,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:12,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:12,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:12,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:12,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:10:12,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102967144] [2021-03-10 21:10:12,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:12,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:12,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:12,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:12,812 INFO L87 Difference]: Start difference. First operand 4631 states and 11705 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:12,950 INFO L93 Difference]: Finished difference Result 5778 states and 13994 transitions. [2021-03-10 21:10:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:12,951 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:12,955 INFO L225 Difference]: With dead ends: 5778 [2021-03-10 21:10:12,955 INFO L226 Difference]: Without dead ends: 5745 [2021-03-10 21:10:12,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-03-10 21:10:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4501. [2021-03-10 21:10:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 2.518) internal successors, (11331), 4500 states have internal predecessors, (11331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11331 transitions. [2021-03-10 21:10:12,998 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11331 transitions. Word has length 41 [2021-03-10 21:10:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:12,999 INFO L480 AbstractCegarLoop]: Abstraction has 4501 states and 11331 transitions. [2021-03-10 21:10:12,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11331 transitions. [2021-03-10 21:10:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:13,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:13,002 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:13,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-03-10 21:10:13,215 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:13,216 INFO L82 PathProgramCache]: Analyzing trace with hash -69821496, now seen corresponding path program 71 times [2021-03-10 21:10:13,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:13,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990875107] [2021-03-10 21:10:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:13,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990875107] [2021-03-10 21:10:13,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707781753] [2021-03-10 21:10:13,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:13,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:10:13,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:13,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:13,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:13,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:13,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:10:13,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150349006] [2021-03-10 21:10:13,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:10:13,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:13,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:10:13,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:13,388 INFO L87 Difference]: Start difference. First operand 4501 states and 11331 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:13,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:13,723 INFO L93 Difference]: Finished difference Result 6725 states and 15932 transitions. [2021-03-10 21:10:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:10:13,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:13,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:13,729 INFO L225 Difference]: With dead ends: 6725 [2021-03-10 21:10:13,729 INFO L226 Difference]: Without dead ends: 6569 [2021-03-10 21:10:13,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:10:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2021-03-10 21:10:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 4248. [2021-03-10 21:10:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.5038850953614316) internal successors, (10634), 4247 states have internal predecessors, (10634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 10634 transitions. [2021-03-10 21:10:13,786 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 10634 transitions. Word has length 41 [2021-03-10 21:10:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:13,786 INFO L480 AbstractCegarLoop]: Abstraction has 4248 states and 10634 transitions. [2021-03-10 21:10:13,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 10634 transitions. [2021-03-10 21:10:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:13,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:13,789 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:13,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:13,990 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:13,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:13,990 INFO L82 PathProgramCache]: Analyzing trace with hash -307883013, now seen corresponding path program 41 times [2021-03-10 21:10:13,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:13,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500694561] [2021-03-10 21:10:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:14,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500694561] [2021-03-10 21:10:14,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659165934] [2021-03-10 21:10:14,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:14,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:10:14,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:14,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:14,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:14,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:14,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-03-10 21:10:14,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408486072] [2021-03-10 21:10:14,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:14,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:14,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:14,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:14,124 INFO L87 Difference]: Start difference. First operand 4248 states and 10634 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:14,257 INFO L93 Difference]: Finished difference Result 5485 states and 13223 transitions. [2021-03-10 21:10:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:14,257 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:14,261 INFO L225 Difference]: With dead ends: 5485 [2021-03-10 21:10:14,262 INFO L226 Difference]: Without dead ends: 5471 [2021-03-10 21:10:14,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:14,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-03-10 21:10:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 4359. [2021-03-10 21:10:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 2.5094079853143643) internal successors, (10936), 4358 states have internal predecessors, (10936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 10936 transitions. [2021-03-10 21:10:14,303 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 10936 transitions. Word has length 41 [2021-03-10 21:10:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:14,304 INFO L480 AbstractCegarLoop]: Abstraction has 4359 states and 10936 transitions. [2021-03-10 21:10:14,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 10936 transitions. [2021-03-10 21:10:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:14,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:14,306 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:14,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:14,507 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:14,507 INFO L82 PathProgramCache]: Analyzing trace with hash -929763423, now seen corresponding path program 42 times [2021-03-10 21:10:14,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:14,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105988827] [2021-03-10 21:10:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:14,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105988827] [2021-03-10 21:10:14,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294845301] [2021-03-10 21:10:14,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:14,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 21:10:14,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:10:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:14,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:14,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-03-10 21:10:14,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535999067] [2021-03-10 21:10:14,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:14,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:14,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:14,639 INFO L87 Difference]: Start difference. First operand 4359 states and 10936 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:14,835 INFO L93 Difference]: Finished difference Result 5470 states and 13116 transitions. [2021-03-10 21:10:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:10:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:14,839 INFO L225 Difference]: With dead ends: 5470 [2021-03-10 21:10:14,839 INFO L226 Difference]: Without dead ends: 5470 [2021-03-10 21:10:14,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:10:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2021-03-10 21:10:14,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 4095. [2021-03-10 21:10:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4095 states, 4094 states have (on average 2.5073277967757694) internal successors, (10265), 4094 states have internal predecessors, (10265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4095 states to 4095 states and 10265 transitions. [2021-03-10 21:10:14,879 INFO L78 Accepts]: Start accepts. Automaton has 4095 states and 10265 transitions. Word has length 41 [2021-03-10 21:10:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:14,879 INFO L480 AbstractCegarLoop]: Abstraction has 4095 states and 10265 transitions. [2021-03-10 21:10:14,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4095 states and 10265 transitions. [2021-03-10 21:10:14,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:14,881 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:14,881 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:15,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:15,082 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:15,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1823751373, now seen corresponding path program 72 times [2021-03-10 21:10:15,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:15,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085904589] [2021-03-10 21:10:15,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:15,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085904589] [2021-03-10 21:10:15,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934840040] [2021-03-10 21:10:15,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:15,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:10:15,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:15,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:15,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:15,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:15,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:10:15,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461917339] [2021-03-10 21:10:15,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:10:15,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:15,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:10:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:15,233 INFO L87 Difference]: Start difference. First operand 4095 states and 10265 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:15,385 INFO L93 Difference]: Finished difference Result 4978 states and 12069 transitions. [2021-03-10 21:10:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:15,389 INFO L225 Difference]: With dead ends: 4978 [2021-03-10 21:10:15,389 INFO L226 Difference]: Without dead ends: 4942 [2021-03-10 21:10:15,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:10:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-03-10 21:10:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4104. [2021-03-10 21:10:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 4103 states have (on average 2.5047526200341212) internal successors, (10277), 4103 states have internal predecessors, (10277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 10277 transitions. [2021-03-10 21:10:15,427 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 10277 transitions. Word has length 41 [2021-03-10 21:10:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:15,427 INFO L480 AbstractCegarLoop]: Abstraction has 4104 states and 10277 transitions. [2021-03-10 21:10:15,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 10277 transitions. [2021-03-10 21:10:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:15,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:15,429 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:15,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-03-10 21:10:15,630 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:15,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:15,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1062684898, now seen corresponding path program 43 times [2021-03-10 21:10:15,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:15,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616329251] [2021-03-10 21:10:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:15,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616329251] [2021-03-10 21:10:15,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507833721] [2021-03-10 21:10:15,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:15,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:15,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:15,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:15,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:10:15,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975049861] [2021-03-10 21:10:15,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:10:15,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:15,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:10:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:15,789 INFO L87 Difference]: Start difference. First operand 4104 states and 10277 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:16,100 INFO L93 Difference]: Finished difference Result 5531 states and 13423 transitions. [2021-03-10 21:10:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:10:16,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:16,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:16,106 INFO L225 Difference]: With dead ends: 5531 [2021-03-10 21:10:16,106 INFO L226 Difference]: Without dead ends: 5501 [2021-03-10 21:10:16,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:10:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-03-10 21:10:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4233. [2021-03-10 21:10:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 2.508506616257089) internal successors, (10616), 4232 states have internal predecessors, (10616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 10616 transitions. [2021-03-10 21:10:16,148 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 10616 transitions. Word has length 41 [2021-03-10 21:10:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:16,148 INFO L480 AbstractCegarLoop]: Abstraction has 4233 states and 10616 transitions. [2021-03-10 21:10:16,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 10616 transitions. [2021-03-10 21:10:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:16,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:16,151 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:16,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:16,359 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:16,359 INFO L82 PathProgramCache]: Analyzing trace with hash 237090838, now seen corresponding path program 73 times [2021-03-10 21:10:16,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:16,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429440999] [2021-03-10 21:10:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:16,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429440999] [2021-03-10 21:10:16,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151794550] [2021-03-10 21:10:16,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:16,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:16,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:16,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:16,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:10:16,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744633285] [2021-03-10 21:10:16,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:10:16,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:16,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:10:16,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:16,563 INFO L87 Difference]: Start difference. First operand 4233 states and 10616 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:16,899 INFO L93 Difference]: Finished difference Result 4488 states and 11071 transitions. [2021-03-10 21:10:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:16,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:16,903 INFO L225 Difference]: With dead ends: 4488 [2021-03-10 21:10:16,903 INFO L226 Difference]: Without dead ends: 4400 [2021-03-10 21:10:16,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:10:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-03-10 21:10:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 4224. [2021-03-10 21:10:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 4223 states have (on average 2.505564764385508) internal successors, (10581), 4223 states have internal predecessors, (10581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 10581 transitions. [2021-03-10 21:10:16,939 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 10581 transitions. Word has length 41 [2021-03-10 21:10:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:16,939 INFO L480 AbstractCegarLoop]: Abstraction has 4224 states and 10581 transitions. [2021-03-10 21:10:16,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 10581 transitions. [2021-03-10 21:10:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:16,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:16,941 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:17,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:17,142 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:17,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1009794955, now seen corresponding path program 74 times [2021-03-10 21:10:17,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:17,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611726371] [2021-03-10 21:10:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:17,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611726371] [2021-03-10 21:10:17,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176410201] [2021-03-10 21:10:17,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:17,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:17,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:17,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:17,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:17,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:17,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:10:17,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212224369] [2021-03-10 21:10:17,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:17,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:17,274 INFO L87 Difference]: Start difference. First operand 4224 states and 10581 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:17,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:17,444 INFO L93 Difference]: Finished difference Result 5631 states and 13883 transitions. [2021-03-10 21:10:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:17,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:17,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:17,449 INFO L225 Difference]: With dead ends: 5631 [2021-03-10 21:10:17,449 INFO L226 Difference]: Without dead ends: 5631 [2021-03-10 21:10:17,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:10:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-03-10 21:10:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 4503. [2021-03-10 21:10:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 2.540648600621946) internal successors, (11438), 4502 states have internal predecessors, (11438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 11438 transitions. [2021-03-10 21:10:17,493 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 11438 transitions. Word has length 41 [2021-03-10 21:10:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:17,493 INFO L480 AbstractCegarLoop]: Abstraction has 4503 states and 11438 transitions. [2021-03-10 21:10:17,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 11438 transitions. [2021-03-10 21:10:17,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:17,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:17,495 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:17,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:17,696 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:17,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1038909258, now seen corresponding path program 44 times [2021-03-10 21:10:17,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:17,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183907329] [2021-03-10 21:10:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:17,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183907329] [2021-03-10 21:10:17,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867665867] [2021-03-10 21:10:17,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:17,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:17,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:17,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:17,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:17,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:17,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:10:17,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789031159] [2021-03-10 21:10:17,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:17,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:17,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:17,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:17,844 INFO L87 Difference]: Start difference. First operand 4503 states and 11438 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:18,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:18,103 INFO L93 Difference]: Finished difference Result 5644 states and 13966 transitions. [2021-03-10 21:10:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:10:18,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:18,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:18,108 INFO L225 Difference]: With dead ends: 5644 [2021-03-10 21:10:18,108 INFO L226 Difference]: Without dead ends: 5644 [2021-03-10 21:10:18,108 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:10:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2021-03-10 21:10:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 4551. [2021-03-10 21:10:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4551 states, 4550 states have (on average 2.545714285714286) internal successors, (11583), 4550 states have internal predecessors, (11583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4551 states to 4551 states and 11583 transitions. [2021-03-10 21:10:18,151 INFO L78 Accepts]: Start accepts. Automaton has 4551 states and 11583 transitions. Word has length 41 [2021-03-10 21:10:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:18,151 INFO L480 AbstractCegarLoop]: Abstraction has 4551 states and 11583 transitions. [2021-03-10 21:10:18,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4551 states and 11583 transitions. [2021-03-10 21:10:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:18,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:18,154 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:18,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-03-10 21:10:18,354 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:18,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1464770646, now seen corresponding path program 75 times [2021-03-10 21:10:18,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:18,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813548444] [2021-03-10 21:10:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:18,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813548444] [2021-03-10 21:10:18,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110491085] [2021-03-10 21:10:18,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:18,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:10:18,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:18,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:18,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:18,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:18,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 21:10:18,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312446362] [2021-03-10 21:10:18,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:18,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:18,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:18,520 INFO L87 Difference]: Start difference. First operand 4551 states and 11583 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:18,789 INFO L93 Difference]: Finished difference Result 4818 states and 12047 transitions. [2021-03-10 21:10:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:18,790 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:18,794 INFO L225 Difference]: With dead ends: 4818 [2021-03-10 21:10:18,794 INFO L226 Difference]: Without dead ends: 4766 [2021-03-10 21:10:18,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2021-03-10 21:10:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 4542. [2021-03-10 21:10:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4542 states, 4541 states have (on average 2.5445937018277913) internal successors, (11555), 4541 states have internal predecessors, (11555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 11555 transitions. [2021-03-10 21:10:18,837 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 11555 transitions. Word has length 41 [2021-03-10 21:10:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:18,837 INFO L480 AbstractCegarLoop]: Abstraction has 4542 states and 11555 transitions. [2021-03-10 21:10:18,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 11555 transitions. [2021-03-10 21:10:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:18,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:18,840 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:19,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-03-10 21:10:19,051 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1554389111, now seen corresponding path program 45 times [2021-03-10 21:10:19,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:19,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214291169] [2021-03-10 21:10:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:19,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214291169] [2021-03-10 21:10:19,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342898455] [2021-03-10 21:10:19,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:19,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:10:19,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:19,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:19,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:19,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:10:19,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243728723] [2021-03-10 21:10:19,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:10:19,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:19,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:10:19,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:19,180 INFO L87 Difference]: Start difference. First operand 4542 states and 11555 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:19,347 INFO L93 Difference]: Finished difference Result 5367 states and 13217 transitions. [2021-03-10 21:10:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:19,352 INFO L225 Difference]: With dead ends: 5367 [2021-03-10 21:10:19,352 INFO L226 Difference]: Without dead ends: 5339 [2021-03-10 21:10:19,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2021-03-10 21:10:19,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 4476. [2021-03-10 21:10:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4475 states have (on average 2.5512849162011175) internal successors, (11417), 4475 states have internal predecessors, (11417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 11417 transitions. [2021-03-10 21:10:19,393 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 11417 transitions. Word has length 41 [2021-03-10 21:10:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:19,393 INFO L480 AbstractCegarLoop]: Abstraction has 4476 states and 11417 transitions. [2021-03-10 21:10:19,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:19,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 11417 transitions. [2021-03-10 21:10:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:19,396 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:19,396 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:19,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-03-10 21:10:19,597 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:19,597 INFO L82 PathProgramCache]: Analyzing trace with hash -692902219, now seen corresponding path program 76 times [2021-03-10 21:10:19,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:19,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596849667] [2021-03-10 21:10:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:19,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596849667] [2021-03-10 21:10:19,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075061440] [2021-03-10 21:10:19,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:19,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:19,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:19,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:19,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:19,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:19,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:10:19,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550541225] [2021-03-10 21:10:19,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:19,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:19,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:19,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:19,748 INFO L87 Difference]: Start difference. First operand 4476 states and 11417 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:19,879 INFO L93 Difference]: Finished difference Result 5879 states and 14580 transitions. [2021-03-10 21:10:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:10:19,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:19,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:19,884 INFO L225 Difference]: With dead ends: 5879 [2021-03-10 21:10:19,884 INFO L226 Difference]: Without dead ends: 5879 [2021-03-10 21:10:19,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5879 states. [2021-03-10 21:10:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5879 to 4655. [2021-03-10 21:10:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.5717662226042113) internal successors, (11969), 4654 states have internal predecessors, (11969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 11969 transitions. [2021-03-10 21:10:19,932 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 11969 transitions. Word has length 41 [2021-03-10 21:10:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:19,932 INFO L480 AbstractCegarLoop]: Abstraction has 4655 states and 11969 transitions. [2021-03-10 21:10:19,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 11969 transitions. [2021-03-10 21:10:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:19,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:19,935 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:20,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-03-10 21:10:20,136 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:20,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:20,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1463737886, now seen corresponding path program 46 times [2021-03-10 21:10:20,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:20,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840773759] [2021-03-10 21:10:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:20,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840773759] [2021-03-10 21:10:20,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687507905] [2021-03-10 21:10:20,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:20,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:20,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:20,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:20,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:20,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:20,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:10:20,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783457773] [2021-03-10 21:10:20,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:20,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:20,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:20,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:20,295 INFO L87 Difference]: Start difference. First operand 4655 states and 11969 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:20,532 INFO L93 Difference]: Finished difference Result 5328 states and 13423 transitions. [2021-03-10 21:10:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:10:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:20,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:20,537 INFO L225 Difference]: With dead ends: 5328 [2021-03-10 21:10:20,537 INFO L226 Difference]: Without dead ends: 5324 [2021-03-10 21:10:20,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:10:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2021-03-10 21:10:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 4667. [2021-03-10 21:10:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.5720102871838835) internal successors, (12001), 4666 states have internal predecessors, (12001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 12001 transitions. [2021-03-10 21:10:20,580 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 12001 transitions. Word has length 41 [2021-03-10 21:10:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:20,580 INFO L480 AbstractCegarLoop]: Abstraction has 4667 states and 12001 transitions. [2021-03-10 21:10:20,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 12001 transitions. [2021-03-10 21:10:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:20,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:20,583 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:20,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:20,783 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:20,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1197933026, now seen corresponding path program 77 times [2021-03-10 21:10:20,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:20,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760701113] [2021-03-10 21:10:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:20,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760701113] [2021-03-10 21:10:20,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173000740] [2021-03-10 21:10:20,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:20,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:10:20,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:20,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:20,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:20,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 21:10:20,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909613088] [2021-03-10 21:10:20,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:20,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:20,947 INFO L87 Difference]: Start difference. First operand 4667 states and 12001 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:21,130 INFO L93 Difference]: Finished difference Result 4707 states and 12061 transitions. [2021-03-10 21:10:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:10:21,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:21,135 INFO L225 Difference]: With dead ends: 4707 [2021-03-10 21:10:21,135 INFO L226 Difference]: Without dead ends: 4684 [2021-03-10 21:10:21,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-03-10 21:10:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4658. [2021-03-10 21:10:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.5720420871805882) internal successors, (11978), 4657 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 11978 transitions. [2021-03-10 21:10:21,177 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 11978 transitions. Word has length 41 [2021-03-10 21:10:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:21,177 INFO L480 AbstractCegarLoop]: Abstraction has 4658 states and 11978 transitions. [2021-03-10 21:10:21,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 11978 transitions. [2021-03-10 21:10:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:21,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:21,180 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:21,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:21,380 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1045836265, now seen corresponding path program 78 times [2021-03-10 21:10:21,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:21,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901886046] [2021-03-10 21:10:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:21,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901886046] [2021-03-10 21:10:21,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678076202] [2021-03-10 21:10:21,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:21,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:10:21,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:21,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:21,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:21,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:10:21,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88223470] [2021-03-10 21:10:21,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:21,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:21,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:21,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:21,500 INFO L87 Difference]: Start difference. First operand 4658 states and 11978 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:21,615 INFO L93 Difference]: Finished difference Result 6326 states and 15675 transitions. [2021-03-10 21:10:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:10:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:21,621 INFO L225 Difference]: With dead ends: 6326 [2021-03-10 21:10:21,621 INFO L226 Difference]: Without dead ends: 6326 [2021-03-10 21:10:21,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6326 states. [2021-03-10 21:10:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6326 to 4917. [2021-03-10 21:10:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4917 states, 4916 states have (on average 2.5939788445890968) internal successors, (12752), 4916 states have internal predecessors, (12752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4917 states to 4917 states and 12752 transitions. [2021-03-10 21:10:21,690 INFO L78 Accepts]: Start accepts. Automaton has 4917 states and 12752 transitions. Word has length 41 [2021-03-10 21:10:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:21,690 INFO L480 AbstractCegarLoop]: Abstraction has 4917 states and 12752 transitions. [2021-03-10 21:10:21,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4917 states and 12752 transitions. [2021-03-10 21:10:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:21,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:21,693 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:21,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-03-10 21:10:21,893 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:21,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:21,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1283897782, now seen corresponding path program 47 times [2021-03-10 21:10:21,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:21,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932442498] [2021-03-10 21:10:21,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:21,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932442498] [2021-03-10 21:10:21,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526844964] [2021-03-10 21:10:21,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:21,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:10:21,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:21,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:21,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:22,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:22,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:10:22,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569457189] [2021-03-10 21:10:22,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:22,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:22,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:22,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:22,035 INFO L87 Difference]: Start difference. First operand 4917 states and 12752 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:22,288 INFO L93 Difference]: Finished difference Result 6100 states and 15293 transitions. [2021-03-10 21:10:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:22,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:22,294 INFO L225 Difference]: With dead ends: 6100 [2021-03-10 21:10:22,294 INFO L226 Difference]: Without dead ends: 6059 [2021-03-10 21:10:22,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:22,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-03-10 21:10:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 5266. [2021-03-10 21:10:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5266 states, 5265 states have (on average 2.5753086419753086) internal successors, (13559), 5265 states have internal predecessors, (13559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5266 states to 5266 states and 13559 transitions. [2021-03-10 21:10:22,345 INFO L78 Accepts]: Start accepts. Automaton has 5266 states and 13559 transitions. Word has length 41 [2021-03-10 21:10:22,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:22,345 INFO L480 AbstractCegarLoop]: Abstraction has 5266 states and 13559 transitions. [2021-03-10 21:10:22,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 5266 states and 13559 transitions. [2021-03-10 21:10:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:22,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:22,348 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:22,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:22,548 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:22,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1457372657, now seen corresponding path program 79 times [2021-03-10 21:10:22,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:22,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191704727] [2021-03-10 21:10:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:22,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191704727] [2021-03-10 21:10:22,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748685523] [2021-03-10 21:10:22,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:22,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:22,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:22,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:10:22,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515410990] [2021-03-10 21:10:22,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:22,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:22,668 INFO L87 Difference]: Start difference. First operand 5266 states and 13559 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:22,767 INFO L93 Difference]: Finished difference Result 6555 states and 16173 transitions. [2021-03-10 21:10:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:10:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:22,773 INFO L225 Difference]: With dead ends: 6555 [2021-03-10 21:10:22,773 INFO L226 Difference]: Without dead ends: 6552 [2021-03-10 21:10:22,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2021-03-10 21:10:22,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 5265. [2021-03-10 21:10:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5265 states, 5264 states have (on average 2.574658054711246) internal successors, (13553), 5264 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5265 states to 5265 states and 13553 transitions. [2021-03-10 21:10:22,829 INFO L78 Accepts]: Start accepts. Automaton has 5265 states and 13553 transitions. Word has length 41 [2021-03-10 21:10:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:22,829 INFO L480 AbstractCegarLoop]: Abstraction has 5265 states and 13553 transitions. [2021-03-10 21:10:22,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 5265 states and 13553 transitions. [2021-03-10 21:10:22,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:22,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:22,832 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:23,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:23,032 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:23,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:23,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1664435223, now seen corresponding path program 80 times [2021-03-10 21:10:23,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:23,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962879662] [2021-03-10 21:10:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:23,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962879662] [2021-03-10 21:10:23,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683670956] [2021-03-10 21:10:23,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:23,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:23,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:23,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:23,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:23,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:23,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:10:23,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977213353] [2021-03-10 21:10:23,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:23,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:23,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:23,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:23,163 INFO L87 Difference]: Start difference. First operand 5265 states and 13553 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:23,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:23,260 INFO L93 Difference]: Finished difference Result 6425 states and 16009 transitions. [2021-03-10 21:10:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:10:23,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:23,266 INFO L225 Difference]: With dead ends: 6425 [2021-03-10 21:10:23,266 INFO L226 Difference]: Without dead ends: 6413 [2021-03-10 21:10:23,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6413 states. [2021-03-10 21:10:23,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6413 to 5265. [2021-03-10 21:10:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5265 states, 5264 states have (on average 2.573518237082067) internal successors, (13547), 5264 states have internal predecessors, (13547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5265 states to 5265 states and 13547 transitions. [2021-03-10 21:10:23,344 INFO L78 Accepts]: Start accepts. Automaton has 5265 states and 13547 transitions. Word has length 41 [2021-03-10 21:10:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:23,344 INFO L480 AbstractCegarLoop]: Abstraction has 5265 states and 13547 transitions. [2021-03-10 21:10:23,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 5265 states and 13547 transitions. [2021-03-10 21:10:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:23,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:23,347 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:23,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-03-10 21:10:23,547 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash 216435210, now seen corresponding path program 81 times [2021-03-10 21:10:23,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:23,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580206779] [2021-03-10 21:10:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:23,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580206779] [2021-03-10 21:10:23,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350779732] [2021-03-10 21:10:23,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:23,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:10:23,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:23,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:23,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:23,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:23,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:10:23,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653521292] [2021-03-10 21:10:23,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:23,695 INFO L87 Difference]: Start difference. First operand 5265 states and 13547 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:24,007 INFO L93 Difference]: Finished difference Result 5717 states and 14382 transitions. [2021-03-10 21:10:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:24,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:24,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:24,012 INFO L225 Difference]: With dead ends: 5717 [2021-03-10 21:10:24,012 INFO L226 Difference]: Without dead ends: 5612 [2021-03-10 21:10:24,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5612 states. [2021-03-10 21:10:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5612 to 5100. [2021-03-10 21:10:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5100 states, 5099 states have (on average 2.5777603451657187) internal successors, (13144), 5099 states have internal predecessors, (13144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 13144 transitions. [2021-03-10 21:10:24,063 INFO L78 Accepts]: Start accepts. Automaton has 5100 states and 13144 transitions. Word has length 41 [2021-03-10 21:10:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:24,063 INFO L480 AbstractCegarLoop]: Abstraction has 5100 states and 13144 transitions. [2021-03-10 21:10:24,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 5100 states and 13144 transitions. [2021-03-10 21:10:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:24,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:24,066 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:24,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:24,267 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:24,267 INFO L82 PathProgramCache]: Analyzing trace with hash -554400457, now seen corresponding path program 48 times [2021-03-10 21:10:24,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:24,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425272195] [2021-03-10 21:10:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:24,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425272195] [2021-03-10 21:10:24,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538911055] [2021-03-10 21:10:24,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:24,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:10:24,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:24,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:24,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:24,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:24,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 13 [2021-03-10 21:10:24,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632934409] [2021-03-10 21:10:24,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:10:24,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:24,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:10:24,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:10:24,428 INFO L87 Difference]: Start difference. First operand 5100 states and 13144 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:24,607 INFO L93 Difference]: Finished difference Result 6069 states and 15200 transitions. [2021-03-10 21:10:24,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:10:24,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:24,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:24,613 INFO L225 Difference]: With dead ends: 6069 [2021-03-10 21:10:24,613 INFO L226 Difference]: Without dead ends: 6059 [2021-03-10 21:10:24,613 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:10:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-03-10 21:10:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 5342. [2021-03-10 21:10:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5342 states, 5341 states have (on average 2.578543343943082) internal successors, (13772), 5341 states have internal predecessors, (13772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5342 states to 5342 states and 13772 transitions. [2021-03-10 21:10:24,665 INFO L78 Accepts]: Start accepts. Automaton has 5342 states and 13772 transitions. Word has length 41 [2021-03-10 21:10:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:24,665 INFO L480 AbstractCegarLoop]: Abstraction has 5342 states and 13772 transitions. [2021-03-10 21:10:24,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 5342 states and 13772 transitions. [2021-03-10 21:10:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:24,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:24,668 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:24,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-03-10 21:10:24,868 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:24,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1017591823, now seen corresponding path program 82 times [2021-03-10 21:10:24,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:24,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338056806] [2021-03-10 21:10:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:24,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338056806] [2021-03-10 21:10:24,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436190328] [2021-03-10 21:10:24,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:24,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:24,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:24,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:24,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:25,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:25,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:10:25,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015050682] [2021-03-10 21:10:25,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:25,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:25,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:25,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:25,034 INFO L87 Difference]: Start difference. First operand 5342 states and 13772 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:25,140 INFO L93 Difference]: Finished difference Result 6498 states and 16204 transitions. [2021-03-10 21:10:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:10:25,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:25,146 INFO L225 Difference]: With dead ends: 6498 [2021-03-10 21:10:25,146 INFO L226 Difference]: Without dead ends: 6480 [2021-03-10 21:10:25,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-03-10 21:10:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5432. [2021-03-10 21:10:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 2.5871846805376544) internal successors, (14051), 5431 states have internal predecessors, (14051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 14051 transitions. [2021-03-10 21:10:25,225 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 14051 transitions. Word has length 41 [2021-03-10 21:10:25,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:25,225 INFO L480 AbstractCegarLoop]: Abstraction has 5432 states and 14051 transitions. [2021-03-10 21:10:25,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:25,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 14051 transitions. [2021-03-10 21:10:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:25,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:25,228 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:25,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:25,428 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2008711721, now seen corresponding path program 83 times [2021-03-10 21:10:25,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:25,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189016222] [2021-03-10 21:10:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:25,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189016222] [2021-03-10 21:10:25,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395195765] [2021-03-10 21:10:25,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:25,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:10:25,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:25,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:25,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:25,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-03-10 21:10:25,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013789656] [2021-03-10 21:10:25,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:10:25,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:25,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:10:25,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:25,581 INFO L87 Difference]: Start difference. First operand 5432 states and 14051 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:25,780 INFO L93 Difference]: Finished difference Result 6652 states and 16506 transitions. [2021-03-10 21:10:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:25,787 INFO L225 Difference]: With dead ends: 6652 [2021-03-10 21:10:25,787 INFO L226 Difference]: Without dead ends: 6625 [2021-03-10 21:10:25,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:10:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6625 states. [2021-03-10 21:10:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6625 to 5432. [2021-03-10 21:10:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 2.5866322960780703) internal successors, (14048), 5431 states have internal predecessors, (14048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 14048 transitions. [2021-03-10 21:10:25,849 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 14048 transitions. Word has length 41 [2021-03-10 21:10:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:25,849 INFO L480 AbstractCegarLoop]: Abstraction has 5432 states and 14048 transitions. [2021-03-10 21:10:25,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 14048 transitions. [2021-03-10 21:10:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:25,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:25,852 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:26,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-03-10 21:10:26,052 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:26,053 INFO L82 PathProgramCache]: Analyzing trace with hash -561433039, now seen corresponding path program 84 times [2021-03-10 21:10:26,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:26,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278058391] [2021-03-10 21:10:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:26,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278058391] [2021-03-10 21:10:26,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382895949] [2021-03-10 21:10:26,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:26,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:10:26,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:26,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:26,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:26,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:26,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:10:26,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629857671] [2021-03-10 21:10:26,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:10:26,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:10:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:26,206 INFO L87 Difference]: Start difference. First operand 5432 states and 14048 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:26,358 INFO L93 Difference]: Finished difference Result 6669 states and 16503 transitions. [2021-03-10 21:10:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:26,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:26,364 INFO L225 Difference]: With dead ends: 6669 [2021-03-10 21:10:26,364 INFO L226 Difference]: Without dead ends: 6633 [2021-03-10 21:10:26,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:10:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2021-03-10 21:10:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 5432. [2021-03-10 21:10:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 2.5860799116184863) internal successors, (14045), 5431 states have internal predecessors, (14045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 14045 transitions. [2021-03-10 21:10:26,422 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 14045 transitions. Word has length 41 [2021-03-10 21:10:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:26,422 INFO L480 AbstractCegarLoop]: Abstraction has 5432 states and 14045 transitions. [2021-03-10 21:10:26,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 14045 transitions. [2021-03-10 21:10:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:26,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:26,425 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:26,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:26,626 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:26,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:26,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1686647522, now seen corresponding path program 85 times [2021-03-10 21:10:26,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:26,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458343772] [2021-03-10 21:10:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:26,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458343772] [2021-03-10 21:10:26,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363779234] [2021-03-10 21:10:26,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:26,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:10:26,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:26,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:10:26,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-03-10 21:10:26,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:10:26,854 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-03-10 21:10:26,854 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:10:26,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:10:26,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-03-10 21:10:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:26,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:26,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 21:10:26,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703404319] [2021-03-10 21:10:26,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:10:26,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:26,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:10:26,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:10:26,862 INFO L87 Difference]: Start difference. First operand 5432 states and 14045 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:28,117 INFO L93 Difference]: Finished difference Result 11534 states and 27378 transitions. [2021-03-10 21:10:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 21:10:28,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:28,128 INFO L225 Difference]: With dead ends: 11534 [2021-03-10 21:10:28,128 INFO L226 Difference]: Without dead ends: 11160 [2021-03-10 21:10:28,129 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 800.8ms TimeCoverageRelationStatistics Valid=697, Invalid=5155, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 21:10:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11160 states. [2021-03-10 21:10:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11160 to 7099. [2021-03-10 21:10:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 2.569737954353339) internal successors, (18240), 7098 states have internal predecessors, (18240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18240 transitions. [2021-03-10 21:10:28,223 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18240 transitions. Word has length 41 [2021-03-10 21:10:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:28,223 INFO L480 AbstractCegarLoop]: Abstraction has 7099 states and 18240 transitions. [2021-03-10 21:10:28,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18240 transitions. [2021-03-10 21:10:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:28,226 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:28,226 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:28,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-03-10 21:10:28,427 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:28,427 INFO L82 PathProgramCache]: Analyzing trace with hash 826705595, now seen corresponding path program 49 times [2021-03-10 21:10:28,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:28,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75965163] [2021-03-10 21:10:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75965163] [2021-03-10 21:10:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624269313] [2021-03-10 21:10:28,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:28,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:10:28,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:28,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:28,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-03-10 21:10:28,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505131937] [2021-03-10 21:10:28,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:28,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:28,557 INFO L87 Difference]: Start difference. First operand 7099 states and 18240 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:28,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:28,859 INFO L93 Difference]: Finished difference Result 8552 states and 21217 transitions. [2021-03-10 21:10:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:10:28,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:28,867 INFO L225 Difference]: With dead ends: 8552 [2021-03-10 21:10:28,868 INFO L226 Difference]: Without dead ends: 8552 [2021-03-10 21:10:28,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:10:28,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8552 states. [2021-03-10 21:10:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8552 to 6505. [2021-03-10 21:10:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6504 states have (on average 2.5899446494464944) internal successors, (16845), 6504 states have internal predecessors, (16845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 16845 transitions. [2021-03-10 21:10:28,941 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 16845 transitions. Word has length 41 [2021-03-10 21:10:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:28,941 INFO L480 AbstractCegarLoop]: Abstraction has 6505 states and 16845 transitions. [2021-03-10 21:10:28,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:28,941 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 16845 transitions. [2021-03-10 21:10:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:10:28,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:28,944 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:29,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:29,145 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:29,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1858902121, now seen corresponding path program 86 times [2021-03-10 21:10:29,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:29,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624460246] [2021-03-10 21:10:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:29,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624460246] [2021-03-10 21:10:29,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955131387] [2021-03-10 21:10:29,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:29,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:29,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:10:29,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:29,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:29,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:10:29,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794598686] [2021-03-10 21:10:29,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:10:29,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:29,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:10:29,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:29,300 INFO L87 Difference]: Start difference. First operand 6505 states and 16845 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:29,516 INFO L93 Difference]: Finished difference Result 7416 states and 18692 transitions. [2021-03-10 21:10:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:29,516 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:10:29,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:29,522 INFO L225 Difference]: With dead ends: 7416 [2021-03-10 21:10:29,522 INFO L226 Difference]: Without dead ends: 7369 [2021-03-10 21:10:29,523 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:10:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7369 states. [2021-03-10 21:10:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7369 to 6514. [2021-03-10 21:10:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6514 states, 6513 states have (on average 2.5885152771380318) internal successors, (16859), 6513 states have internal predecessors, (16859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6514 states to 6514 states and 16859 transitions. [2021-03-10 21:10:29,590 INFO L78 Accepts]: Start accepts. Automaton has 6514 states and 16859 transitions. Word has length 41 [2021-03-10 21:10:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:29,591 INFO L480 AbstractCegarLoop]: Abstraction has 6514 states and 16859 transitions. [2021-03-10 21:10:29,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 6514 states and 16859 transitions. [2021-03-10 21:10:29,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:10:29,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:29,594 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:29,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-03-10 21:10:29,795 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1594502808, now seen corresponding path program 87 times [2021-03-10 21:10:29,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:29,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635916041] [2021-03-10 21:10:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:29,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635916041] [2021-03-10 21:10:29,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185115590] [2021-03-10 21:10:29,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:29,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:10:29,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:29,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:10:29,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:30,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:30,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-03-10 21:10:30,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723830170] [2021-03-10 21:10:30,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:10:30,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:30,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:10:30,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:10:30,056 INFO L87 Difference]: Start difference. First operand 6514 states and 16859 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:30,897 INFO L93 Difference]: Finished difference Result 9208 states and 22696 transitions. [2021-03-10 21:10:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:10:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:10:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:30,908 INFO L225 Difference]: With dead ends: 9208 [2021-03-10 21:10:30,908 INFO L226 Difference]: Without dead ends: 9161 [2021-03-10 21:10:30,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 483.9ms TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:10:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9161 states. [2021-03-10 21:10:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9161 to 7588. [2021-03-10 21:10:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7588 states, 7587 states have (on average 2.5732173454593386) internal successors, (19523), 7587 states have internal predecessors, (19523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7588 states to 7588 states and 19523 transitions. [2021-03-10 21:10:30,995 INFO L78 Accepts]: Start accepts. Automaton has 7588 states and 19523 transitions. Word has length 44 [2021-03-10 21:10:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:30,995 INFO L480 AbstractCegarLoop]: Abstraction has 7588 states and 19523 transitions. [2021-03-10 21:10:30,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:30,995 INFO L276 IsEmpty]: Start isEmpty. Operand 7588 states and 19523 transitions. [2021-03-10 21:10:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:10:31,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:31,000 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:31,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-03-10 21:10:31,201 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:31,201 INFO L82 PathProgramCache]: Analyzing trace with hash 667584024, now seen corresponding path program 88 times [2021-03-10 21:10:31,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:31,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289672824] [2021-03-10 21:10:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:10:31,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289672824] [2021-03-10 21:10:31,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650470928] [2021-03-10 21:10:31,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:31,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:31,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:31,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:10:31,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:10:31,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:31,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 21:10:31,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48384364] [2021-03-10 21:10:31,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:10:31,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:31,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:10:31,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:10:31,346 INFO L87 Difference]: Start difference. First operand 7588 states and 19523 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:31,531 INFO L93 Difference]: Finished difference Result 8642 states and 21769 transitions. [2021-03-10 21:10:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:10:31,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:10:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:31,540 INFO L225 Difference]: With dead ends: 8642 [2021-03-10 21:10:31,540 INFO L226 Difference]: Without dead ends: 8598 [2021-03-10 21:10:31,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:10:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8598 states. [2021-03-10 21:10:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8598 to 7731. [2021-03-10 21:10:31,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 2.5697283311772314) internal successors, (19864), 7730 states have internal predecessors, (19864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 19864 transitions. [2021-03-10 21:10:31,645 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 19864 transitions. Word has length 44 [2021-03-10 21:10:31,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:31,645 INFO L480 AbstractCegarLoop]: Abstraction has 7731 states and 19864 transitions. [2021-03-10 21:10:31,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 19864 transitions. [2021-03-10 21:10:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:10:31,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:31,649 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:31,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:31,849 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash 880481349, now seen corresponding path program 1 times [2021-03-10 21:10:31,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:31,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025314193] [2021-03-10 21:10:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:31,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025314193] [2021-03-10 21:10:31,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162954707] [2021-03-10 21:10:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:31,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:32,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:32,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 21:10:32,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097693291] [2021-03-10 21:10:32,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:10:32,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:32,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:10:32,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:10:32,126 INFO L87 Difference]: Start difference. First operand 7731 states and 19864 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:32,517 INFO L93 Difference]: Finished difference Result 7845 states and 20045 transitions. [2021-03-10 21:10:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:10:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:32,524 INFO L225 Difference]: With dead ends: 7845 [2021-03-10 21:10:32,524 INFO L226 Difference]: Without dead ends: 7727 [2021-03-10 21:10:32,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:10:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-03-10 21:10:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7701. [2021-03-10 21:10:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7701 states, 7700 states have (on average 2.570649350649351) internal successors, (19794), 7700 states have internal predecessors, (19794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7701 states to 7701 states and 19794 transitions. [2021-03-10 21:10:32,601 INFO L78 Accepts]: Start accepts. Automaton has 7701 states and 19794 transitions. Word has length 44 [2021-03-10 21:10:32,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:32,601 INFO L480 AbstractCegarLoop]: Abstraction has 7701 states and 19794 transitions. [2021-03-10 21:10:32,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 7701 states and 19794 transitions. [2021-03-10 21:10:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:10:32,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:32,605 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:32,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-03-10 21:10:32,806 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:32,806 INFO L82 PathProgramCache]: Analyzing trace with hash -19269454, now seen corresponding path program 89 times [2021-03-10 21:10:32,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:32,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492096714] [2021-03-10 21:10:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:10:32,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492096714] [2021-03-10 21:10:32,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555907382] [2021-03-10 21:10:32,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:32,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:10:32,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:32,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:10:32,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:10:32,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:32,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 21:10:32,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486874000] [2021-03-10 21:10:32,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:10:32,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:32,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:10:32,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:10:32,932 INFO L87 Difference]: Start difference. First operand 7701 states and 19794 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:33,111 INFO L93 Difference]: Finished difference Result 8580 states and 21649 transitions. [2021-03-10 21:10:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:10:33,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:10:33,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:33,119 INFO L225 Difference]: With dead ends: 8580 [2021-03-10 21:10:33,119 INFO L226 Difference]: Without dead ends: 8543 [2021-03-10 21:10:33,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:10:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8543 states. [2021-03-10 21:10:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8543 to 7765. [2021-03-10 21:10:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7765 states, 7764 states have (on average 2.566975785677486) internal successors, (19930), 7764 states have internal predecessors, (19930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7765 states to 7765 states and 19930 transitions. [2021-03-10 21:10:33,196 INFO L78 Accepts]: Start accepts. Automaton has 7765 states and 19930 transitions. Word has length 44 [2021-03-10 21:10:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:33,196 INFO L480 AbstractCegarLoop]: Abstraction has 7765 states and 19930 transitions. [2021-03-10 21:10:33,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 7765 states and 19930 transitions. [2021-03-10 21:10:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:10:33,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:33,200 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:33,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:33,402 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:33,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:33,402 INFO L82 PathProgramCache]: Analyzing trace with hash -847034408, now seen corresponding path program 90 times [2021-03-10 21:10:33,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:33,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107931395] [2021-03-10 21:10:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:10:33,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107931395] [2021-03-10 21:10:33,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461013444] [2021-03-10 21:10:33,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:33,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-03-10 21:10:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:33,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:33,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:10:33,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789206385] [2021-03-10 21:10:33,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:10:33,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:33,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:10:33,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:33,590 INFO L87 Difference]: Start difference. First operand 7765 states and 19930 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:34,083 INFO L93 Difference]: Finished difference Result 10515 states and 25410 transitions. [2021-03-10 21:10:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:10:34,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:10:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:34,093 INFO L225 Difference]: With dead ends: 10515 [2021-03-10 21:10:34,093 INFO L226 Difference]: Without dead ends: 10454 [2021-03-10 21:10:34,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:10:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10454 states. [2021-03-10 21:10:34,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10454 to 7810. [2021-03-10 21:10:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7810 states, 7809 states have (on average 2.5625560250992443) internal successors, (20011), 7809 states have internal predecessors, (20011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7810 states to 7810 states and 20011 transitions. [2021-03-10 21:10:34,181 INFO L78 Accepts]: Start accepts. Automaton has 7810 states and 20011 transitions. Word has length 44 [2021-03-10 21:10:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:34,181 INFO L480 AbstractCegarLoop]: Abstraction has 7810 states and 20011 transitions. [2021-03-10 21:10:34,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 7810 states and 20011 transitions. [2021-03-10 21:10:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:10:34,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:34,186 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:34,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:34,386 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:34,387 INFO L82 PathProgramCache]: Analyzing trace with hash 909434610, now seen corresponding path program 91 times [2021-03-10 21:10:34,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:34,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512457815] [2021-03-10 21:10:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:10:34,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512457815] [2021-03-10 21:10:34,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321127286] [2021-03-10 21:10:34,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:34,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:10:34,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:10:34,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:34,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 21:10:34,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535649580] [2021-03-10 21:10:34,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:10:34,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:10:34,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:10:34,526 INFO L87 Difference]: Start difference. First operand 7810 states and 20011 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:34,713 INFO L93 Difference]: Finished difference Result 8580 states and 21601 transitions. [2021-03-10 21:10:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:10:34,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:10:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:34,721 INFO L225 Difference]: With dead ends: 8580 [2021-03-10 21:10:34,721 INFO L226 Difference]: Without dead ends: 8543 [2021-03-10 21:10:34,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:10:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8543 states. [2021-03-10 21:10:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8543 to 7882. [2021-03-10 21:10:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7882 states, 7881 states have (on average 2.557162796599416) internal successors, (20153), 7881 states have internal predecessors, (20153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7882 states to 7882 states and 20153 transitions. [2021-03-10 21:10:34,800 INFO L78 Accepts]: Start accepts. Automaton has 7882 states and 20153 transitions. Word has length 44 [2021-03-10 21:10:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:34,800 INFO L480 AbstractCegarLoop]: Abstraction has 7882 states and 20153 transitions. [2021-03-10 21:10:34,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 7882 states and 20153 transitions. [2021-03-10 21:10:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:10:34,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:34,804 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:35,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:35,005 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1886175147, now seen corresponding path program 2 times [2021-03-10 21:10:35,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:35,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499659298] [2021-03-10 21:10:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:35,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499659298] [2021-03-10 21:10:35,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762240650] [2021-03-10 21:10:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:35,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:35,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:35,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:35,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:35,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 21:10:35,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351885541] [2021-03-10 21:10:35,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:10:35,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:10:35,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:35,235 INFO L87 Difference]: Start difference. First operand 7882 states and 20153 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:35,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:35,569 INFO L93 Difference]: Finished difference Result 7972 states and 20292 transitions. [2021-03-10 21:10:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:35,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:10:35,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:35,576 INFO L225 Difference]: With dead ends: 7972 [2021-03-10 21:10:35,576 INFO L226 Difference]: Without dead ends: 7878 [2021-03-10 21:10:35,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-03-10 21:10:35,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 7852. [2021-03-10 21:10:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7852 states, 7851 states have (on average 2.5580180868679148) internal successors, (20083), 7851 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7852 states to 7852 states and 20083 transitions. [2021-03-10 21:10:35,685 INFO L78 Accepts]: Start accepts. Automaton has 7852 states and 20083 transitions. Word has length 44 [2021-03-10 21:10:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:35,685 INFO L480 AbstractCegarLoop]: Abstraction has 7852 states and 20083 transitions. [2021-03-10 21:10:35,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7852 states and 20083 transitions. [2021-03-10 21:10:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:10:35,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:35,689 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:35,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:35,889 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:35,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1721768829, now seen corresponding path program 3 times [2021-03-10 21:10:35,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:35,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593610640] [2021-03-10 21:10:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:35,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593610640] [2021-03-10 21:10:35,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858053806] [2021-03-10 21:10:35,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:35,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:10:35,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:35,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:10:35,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:36,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:36,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:10:36,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529365979] [2021-03-10 21:10:36,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:10:36,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:36,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:10:36,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:36,100 INFO L87 Difference]: Start difference. First operand 7852 states and 20083 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:36,340 INFO L93 Difference]: Finished difference Result 7904 states and 20150 transitions. [2021-03-10 21:10:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:36,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:10:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:36,347 INFO L225 Difference]: With dead ends: 7904 [2021-03-10 21:10:36,347 INFO L226 Difference]: Without dead ends: 7834 [2021-03-10 21:10:36,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7834 states. [2021-03-10 21:10:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7834 to 7808. [2021-03-10 21:10:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7808 states, 7807 states have (on average 2.559625976687588) internal successors, (19983), 7807 states have internal predecessors, (19983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7808 states to 7808 states and 19983 transitions. [2021-03-10 21:10:36,420 INFO L78 Accepts]: Start accepts. Automaton has 7808 states and 19983 transitions. Word has length 44 [2021-03-10 21:10:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:36,420 INFO L480 AbstractCegarLoop]: Abstraction has 7808 states and 19983 transitions. [2021-03-10 21:10:36,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 7808 states and 19983 transitions. [2021-03-10 21:10:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:36,424 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:36,424 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:36,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-03-10 21:10:36,625 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash 106678869, now seen corresponding path program 50 times [2021-03-10 21:10:36,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:36,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224613441] [2021-03-10 21:10:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:36,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224613441] [2021-03-10 21:10:36,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415541201] [2021-03-10 21:10:36,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:36,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:36,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:36,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:10:36,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:37,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:37,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-03-10 21:10:37,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818624362] [2021-03-10 21:10:37,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:10:37,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:10:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:10:37,348 INFO L87 Difference]: Start difference. First operand 7808 states and 19983 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:44,790 INFO L93 Difference]: Finished difference Result 18551 states and 43891 transitions. [2021-03-10 21:10:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-03-10 21:10:44,791 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:44,807 INFO L225 Difference]: With dead ends: 18551 [2021-03-10 21:10:44,807 INFO L226 Difference]: Without dead ends: 18105 [2021-03-10 21:10:44,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 6134.4ms TimeCoverageRelationStatistics Valid=5955, Invalid=38777, Unknown=0, NotChecked=0, Total=44732 [2021-03-10 21:10:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18105 states. [2021-03-10 21:10:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18105 to 10044. [2021-03-10 21:10:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10044 states, 10043 states have (on average 2.592751169969133) internal successors, (26039), 10043 states have internal predecessors, (26039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10044 states to 10044 states and 26039 transitions. [2021-03-10 21:10:44,956 INFO L78 Accepts]: Start accepts. Automaton has 10044 states and 26039 transitions. Word has length 47 [2021-03-10 21:10:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:44,956 INFO L480 AbstractCegarLoop]: Abstraction has 10044 states and 26039 transitions. [2021-03-10 21:10:44,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 10044 states and 26039 transitions. [2021-03-10 21:10:44,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:44,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:44,963 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:45,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-03-10 21:10:45,167 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:45,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:45,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1340385771, now seen corresponding path program 92 times [2021-03-10 21:10:45,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:45,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33937385] [2021-03-10 21:10:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:45,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33937385] [2021-03-10 21:10:45,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53477259] [2021-03-10 21:10:45,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:45,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:45,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:45,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:10:45,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:45,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:45,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 21:10:45,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426489722] [2021-03-10 21:10:45,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:10:45,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:10:45,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:10:45,470 INFO L87 Difference]: Start difference. First operand 10044 states and 26039 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:46,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:46,198 INFO L93 Difference]: Finished difference Result 10459 states and 26759 transitions. [2021-03-10 21:10:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:10:46,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:46,209 INFO L225 Difference]: With dead ends: 10459 [2021-03-10 21:10:46,209 INFO L226 Difference]: Without dead ends: 10211 [2021-03-10 21:10:46,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:10:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-03-10 21:10:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 9926. [2021-03-10 21:10:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9926 states, 9925 states have (on average 2.5899244332493705) internal successors, (25705), 9925 states have internal predecessors, (25705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9926 states to 9926 states and 25705 transitions. [2021-03-10 21:10:46,320 INFO L78 Accepts]: Start accepts. Automaton has 9926 states and 25705 transitions. Word has length 47 [2021-03-10 21:10:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:46,321 INFO L480 AbstractCegarLoop]: Abstraction has 9926 states and 25705 transitions. [2021-03-10 21:10:46,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 9926 states and 25705 transitions. [2021-03-10 21:10:46,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:46,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:46,327 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:46,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-03-10 21:10:46,531 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:46,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1758131688, now seen corresponding path program 51 times [2021-03-10 21:10:46,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:46,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420774631] [2021-03-10 21:10:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:46,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420774631] [2021-03-10 21:10:46,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131226041] [2021-03-10 21:10:46,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:46,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:10:46,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:46,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:46,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:46,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:46,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:10:46,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969333986] [2021-03-10 21:10:46,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:46,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:46,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:46,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:46,743 INFO L87 Difference]: Start difference. First operand 9926 states and 25705 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:46,888 INFO L93 Difference]: Finished difference Result 12162 states and 30154 transitions. [2021-03-10 21:10:46,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:46,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:46,899 INFO L225 Difference]: With dead ends: 12162 [2021-03-10 21:10:46,900 INFO L226 Difference]: Without dead ends: 12152 [2021-03-10 21:10:46,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12152 states. [2021-03-10 21:10:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12152 to 9982. [2021-03-10 21:10:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9982 states, 9981 states have (on average 2.5934275122733195) internal successors, (25885), 9981 states have internal predecessors, (25885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9982 states to 9982 states and 25885 transitions. [2021-03-10 21:10:47,021 INFO L78 Accepts]: Start accepts. Automaton has 9982 states and 25885 transitions. Word has length 47 [2021-03-10 21:10:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:47,021 INFO L480 AbstractCegarLoop]: Abstraction has 9982 states and 25885 transitions. [2021-03-10 21:10:47,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 9982 states and 25885 transitions. [2021-03-10 21:10:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:47,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:47,027 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:47,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-03-10 21:10:47,228 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:47,228 INFO L82 PathProgramCache]: Analyzing trace with hash 800939048, now seen corresponding path program 52 times [2021-03-10 21:10:47,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:47,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698444673] [2021-03-10 21:10:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 59 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:47,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698444673] [2021-03-10 21:10:47,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455473348] [2021-03-10 21:10:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:47,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:47,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:47,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:47,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:10:47,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23627987] [2021-03-10 21:10:47,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:47,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:47,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:47,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:47,381 INFO L87 Difference]: Start difference. First operand 9982 states and 25885 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:47,525 INFO L93 Difference]: Finished difference Result 13467 states and 33646 transitions. [2021-03-10 21:10:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:47,539 INFO L225 Difference]: With dead ends: 13467 [2021-03-10 21:10:47,539 INFO L226 Difference]: Without dead ends: 13467 [2021-03-10 21:10:47,539 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-03-10 21:10:47,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 10629. [2021-03-10 21:10:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10629 states, 10628 states have (on average 2.6229770417764398) internal successors, (27877), 10628 states have internal predecessors, (27877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 27877 transitions. [2021-03-10 21:10:47,676 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 27877 transitions. Word has length 47 [2021-03-10 21:10:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:47,676 INFO L480 AbstractCegarLoop]: Abstraction has 10629 states and 27877 transitions. [2021-03-10 21:10:47,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 27877 transitions. [2021-03-10 21:10:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:47,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:47,683 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:47,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:47,883 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:47,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:47,883 INFO L82 PathProgramCache]: Analyzing trace with hash 267073672, now seen corresponding path program 93 times [2021-03-10 21:10:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:47,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034415013] [2021-03-10 21:10:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:47,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034415013] [2021-03-10 21:10:47,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252703313] [2021-03-10 21:10:47,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:47,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:10:47,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:48,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:48,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:10:48,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001520483] [2021-03-10 21:10:48,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:48,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:48,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:48,028 INFO L87 Difference]: Start difference. First operand 10629 states and 27877 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:48,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:48,172 INFO L93 Difference]: Finished difference Result 11523 states and 29624 transitions. [2021-03-10 21:10:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:10:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:48,184 INFO L225 Difference]: With dead ends: 11523 [2021-03-10 21:10:48,184 INFO L226 Difference]: Without dead ends: 11517 [2021-03-10 21:10:48,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:48,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11517 states. [2021-03-10 21:10:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11517 to 10468. [2021-03-10 21:10:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.6154581064297315) internal successors, (27376), 10467 states have internal predecessors, (27376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 27376 transitions. [2021-03-10 21:10:48,372 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 27376 transitions. Word has length 47 [2021-03-10 21:10:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:48,372 INFO L480 AbstractCegarLoop]: Abstraction has 10468 states and 27376 transitions. [2021-03-10 21:10:48,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 27376 transitions. [2021-03-10 21:10:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:48,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:48,378 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:48,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-03-10 21:10:48,578 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash 199561890, now seen corresponding path program 94 times [2021-03-10 21:10:48,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:48,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142313291] [2021-03-10 21:10:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:48,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142313291] [2021-03-10 21:10:48,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864233700] [2021-03-10 21:10:48,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:48,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:48,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:48,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:48,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:48,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:10:48,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204120402] [2021-03-10 21:10:48,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:48,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:48,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:48,720 INFO L87 Difference]: Start difference. First operand 10468 states and 27376 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:48,895 INFO L93 Difference]: Finished difference Result 14959 states and 37714 transitions. [2021-03-10 21:10:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:48,911 INFO L225 Difference]: With dead ends: 14959 [2021-03-10 21:10:48,911 INFO L226 Difference]: Without dead ends: 14959 [2021-03-10 21:10:48,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:48,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14959 states. [2021-03-10 21:10:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14959 to 10716. [2021-03-10 21:10:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10716 states, 10715 states have (on average 2.626411572561829) internal successors, (28142), 10715 states have internal predecessors, (28142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10716 states to 10716 states and 28142 transitions. [2021-03-10 21:10:49,063 INFO L78 Accepts]: Start accepts. Automaton has 10716 states and 28142 transitions. Word has length 47 [2021-03-10 21:10:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:49,063 INFO L480 AbstractCegarLoop]: Abstraction has 10716 states and 28142 transitions. [2021-03-10 21:10:49,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 10716 states and 28142 transitions. [2021-03-10 21:10:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:49,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:49,069 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:49,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:49,269 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:49,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:49,270 INFO L82 PathProgramCache]: Analyzing trace with hash -38499627, now seen corresponding path program 53 times [2021-03-10 21:10:49,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:49,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442954493] [2021-03-10 21:10:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:49,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442954493] [2021-03-10 21:10:49,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013782895] [2021-03-10 21:10:49,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:49,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:10:49,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:49,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:10:49,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:49,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:49,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:10:49,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968177551] [2021-03-10 21:10:49,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:49,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:49,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:49,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:49,429 INFO L87 Difference]: Start difference. First operand 10716 states and 28142 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:49,755 INFO L93 Difference]: Finished difference Result 12374 states and 31546 transitions. [2021-03-10 21:10:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:10:49,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:49,768 INFO L225 Difference]: With dead ends: 12374 [2021-03-10 21:10:49,768 INFO L226 Difference]: Without dead ends: 12331 [2021-03-10 21:10:49,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12331 states. [2021-03-10 21:10:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12331 to 10993. [2021-03-10 21:10:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10993 states, 10992 states have (on average 2.6203602620087336) internal successors, (28803), 10992 states have internal predecessors, (28803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 28803 transitions. [2021-03-10 21:10:49,937 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 28803 transitions. Word has length 47 [2021-03-10 21:10:49,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:49,937 INFO L480 AbstractCegarLoop]: Abstraction has 10993 states and 28803 transitions. [2021-03-10 21:10:49,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:49,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 28803 transitions. [2021-03-10 21:10:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:49,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:49,944 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:50,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-03-10 21:10:50,144 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:50,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1592196484, now seen corresponding path program 95 times [2021-03-10 21:10:50,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:50,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130349241] [2021-03-10 21:10:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:50,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130349241] [2021-03-10 21:10:50,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274305198] [2021-03-10 21:10:50,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:50,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:10:50,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:50,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:50,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:50,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:50,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2021-03-10 21:10:50,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288360751] [2021-03-10 21:10:50,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:10:50,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:50,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:10:50,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:10:50,303 INFO L87 Difference]: Start difference. First operand 10993 states and 28803 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:50,510 INFO L93 Difference]: Finished difference Result 12690 states and 32099 transitions. [2021-03-10 21:10:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:10:50,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:50,525 INFO L225 Difference]: With dead ends: 12690 [2021-03-10 21:10:50,525 INFO L226 Difference]: Without dead ends: 12681 [2021-03-10 21:10:50,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:10:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12681 states. [2021-03-10 21:10:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12681 to 10974. [2021-03-10 21:10:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10974 states, 10973 states have (on average 2.617606853185091) internal successors, (28723), 10973 states have internal predecessors, (28723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10974 states to 10974 states and 28723 transitions. [2021-03-10 21:10:50,670 INFO L78 Accepts]: Start accepts. Automaton has 10974 states and 28723 transitions. Word has length 47 [2021-03-10 21:10:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:50,670 INFO L480 AbstractCegarLoop]: Abstraction has 10974 states and 28723 transitions. [2021-03-10 21:10:50,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 10974 states and 28723 transitions. [2021-03-10 21:10:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:50,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:50,676 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:50,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-03-10 21:10:50,877 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:50,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1385133918, now seen corresponding path program 96 times [2021-03-10 21:10:50,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:50,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715146846] [2021-03-10 21:10:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:50,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715146846] [2021-03-10 21:10:50,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779920396] [2021-03-10 21:10:50,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:50,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:10:50,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:51,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:51,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:10:51,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211770311] [2021-03-10 21:10:51,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:51,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:51,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:51,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:51,013 INFO L87 Difference]: Start difference. First operand 10974 states and 28723 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:51,198 INFO L93 Difference]: Finished difference Result 12440 states and 31492 transitions. [2021-03-10 21:10:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:51,198 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:51,211 INFO L225 Difference]: With dead ends: 12440 [2021-03-10 21:10:51,211 INFO L226 Difference]: Without dead ends: 12422 [2021-03-10 21:10:51,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12422 states. [2021-03-10 21:10:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12422 to 10986. [2021-03-10 21:10:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10986 states, 10985 states have (on average 2.6160218479745105) internal successors, (28737), 10985 states have internal predecessors, (28737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10986 states to 10986 states and 28737 transitions. [2021-03-10 21:10:51,341 INFO L78 Accepts]: Start accepts. Automaton has 10986 states and 28737 transitions. Word has length 47 [2021-03-10 21:10:51,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:51,341 INFO L480 AbstractCegarLoop]: Abstraction has 10986 states and 28737 transitions. [2021-03-10 21:10:51,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10986 states and 28737 transitions. [2021-03-10 21:10:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:51,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:51,347 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:51,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-03-10 21:10:51,548 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:51,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1461833365, now seen corresponding path program 97 times [2021-03-10 21:10:51,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:51,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555438435] [2021-03-10 21:10:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:51,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555438435] [2021-03-10 21:10:51,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375399763] [2021-03-10 21:10:51,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:51,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:10:51,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:51,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:51,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:10:51,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763043045] [2021-03-10 21:10:51,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:51,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:51,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:51,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:51,728 INFO L87 Difference]: Start difference. First operand 10986 states and 28737 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:52,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:52,207 INFO L93 Difference]: Finished difference Result 11805 states and 30235 transitions. [2021-03-10 21:10:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:10:52,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:52,217 INFO L225 Difference]: With dead ends: 11805 [2021-03-10 21:10:52,218 INFO L226 Difference]: Without dead ends: 11749 [2021-03-10 21:10:52,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11749 states. [2021-03-10 21:10:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11749 to 10944. [2021-03-10 21:10:52,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10944 states, 10943 states have (on average 2.614822260805995) internal successors, (28614), 10943 states have internal predecessors, (28614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 28614 transitions. [2021-03-10 21:10:52,336 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 28614 transitions. Word has length 47 [2021-03-10 21:10:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:52,336 INFO L480 AbstractCegarLoop]: Abstraction has 10944 states and 28614 transitions. [2021-03-10 21:10:52,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 28614 transitions. [2021-03-10 21:10:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:52,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:52,342 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:52,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-03-10 21:10:52,543 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:52,543 INFO L82 PathProgramCache]: Analyzing trace with hash 848297185, now seen corresponding path program 98 times [2021-03-10 21:10:52,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:52,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895593876] [2021-03-10 21:10:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:52,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895593876] [2021-03-10 21:10:52,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220020895] [2021-03-10 21:10:52,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:52,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:52,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:52,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:10:52,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:52,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:52,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:10:52,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929827891] [2021-03-10 21:10:52,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:52,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:52,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:52,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:52,716 INFO L87 Difference]: Start difference. First operand 10944 states and 28614 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:53,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:53,017 INFO L93 Difference]: Finished difference Result 12000 states and 30676 transitions. [2021-03-10 21:10:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:10:53,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:53,029 INFO L225 Difference]: With dead ends: 12000 [2021-03-10 21:10:53,029 INFO L226 Difference]: Without dead ends: 11959 [2021-03-10 21:10:53,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11959 states. [2021-03-10 21:10:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11959 to 10921. [2021-03-10 21:10:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10921 states, 10920 states have (on average 2.615018315018315) internal successors, (28556), 10920 states have internal predecessors, (28556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10921 states to 10921 states and 28556 transitions. [2021-03-10 21:10:53,154 INFO L78 Accepts]: Start accepts. Automaton has 10921 states and 28556 transitions. Word has length 47 [2021-03-10 21:10:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:53,154 INFO L480 AbstractCegarLoop]: Abstraction has 10921 states and 28556 transitions. [2021-03-10 21:10:53,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 10921 states and 28556 transitions. [2021-03-10 21:10:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:53,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:53,160 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:53,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:53,361 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:53,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1304752777, now seen corresponding path program 99 times [2021-03-10 21:10:53,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:53,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643726933] [2021-03-10 21:10:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:53,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643726933] [2021-03-10 21:10:53,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282535804] [2021-03-10 21:10:53,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:53,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:10:53,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:53,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:10:53,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:53,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:53,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:10:53,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278680240] [2021-03-10 21:10:53,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:53,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:53,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:53,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:53,513 INFO L87 Difference]: Start difference. First operand 10921 states and 28556 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:53,890 INFO L93 Difference]: Finished difference Result 12408 states and 31512 transitions. [2021-03-10 21:10:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:10:53,890 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:53,903 INFO L225 Difference]: With dead ends: 12408 [2021-03-10 21:10:53,903 INFO L226 Difference]: Without dead ends: 12396 [2021-03-10 21:10:53,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:10:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12396 states. [2021-03-10 21:10:54,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12396 to 10956. [2021-03-10 21:10:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10956 states, 10955 states have (on average 2.6144226380648106) internal successors, (28641), 10955 states have internal predecessors, (28641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10956 states to 10956 states and 28641 transitions. [2021-03-10 21:10:54,031 INFO L78 Accepts]: Start accepts. Automaton has 10956 states and 28641 transitions. Word has length 47 [2021-03-10 21:10:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:54,032 INFO L480 AbstractCegarLoop]: Abstraction has 10956 states and 28641 transitions. [2021-03-10 21:10:54,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 10956 states and 28641 transitions. [2021-03-10 21:10:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:54,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:54,038 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:54,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:54,238 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:54,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1542814294, now seen corresponding path program 54 times [2021-03-10 21:10:54,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:54,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180009231] [2021-03-10 21:10:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:54,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180009231] [2021-03-10 21:10:54,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707186906] [2021-03-10 21:10:54,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:54,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:10:54,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:54,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:54,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:54,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:54,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 16 [2021-03-10 21:10:54,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055590083] [2021-03-10 21:10:54,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:10:54,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:54,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:10:54,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:10:54,461 INFO L87 Difference]: Start difference. First operand 10956 states and 28641 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:54,722 INFO L93 Difference]: Finished difference Result 14192 states and 35536 transitions. [2021-03-10 21:10:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:10:54,723 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:54,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:54,737 INFO L225 Difference]: With dead ends: 14192 [2021-03-10 21:10:54,737 INFO L226 Difference]: Without dead ends: 14170 [2021-03-10 21:10:54,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:10:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14170 states. [2021-03-10 21:10:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14170 to 11133. [2021-03-10 21:10:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11133 states, 11132 states have (on average 2.6205533596837944) internal successors, (29172), 11132 states have internal predecessors, (29172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11133 states to 11133 states and 29172 transitions. [2021-03-10 21:10:54,879 INFO L78 Accepts]: Start accepts. Automaton has 11133 states and 29172 transitions. Word has length 47 [2021-03-10 21:10:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:54,879 INFO L480 AbstractCegarLoop]: Abstraction has 11133 states and 29172 transitions. [2021-03-10 21:10:54,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:54,879 INFO L276 IsEmpty]: Start isEmpty. Operand 11133 states and 29172 transitions. [2021-03-10 21:10:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:54,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:54,886 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:55,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:55,086 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash 2130272592, now seen corresponding path program 55 times [2021-03-10 21:10:55,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:55,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661978615] [2021-03-10 21:10:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:10:55,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661978615] [2021-03-10 21:10:55,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107302505] [2021-03-10 21:10:55,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:55,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:55,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:55,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:10:55,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908003904] [2021-03-10 21:10:55,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:55,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:55,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:55,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:55,226 INFO L87 Difference]: Start difference. First operand 11133 states and 29172 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:55,393 INFO L93 Difference]: Finished difference Result 14656 states and 36594 transitions. [2021-03-10 21:10:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:55,408 INFO L225 Difference]: With dead ends: 14656 [2021-03-10 21:10:55,408 INFO L226 Difference]: Without dead ends: 14656 [2021-03-10 21:10:55,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14656 states. [2021-03-10 21:10:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14656 to 11138. [2021-03-10 21:10:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11138 states, 11137 states have (on average 2.620184969022178) internal successors, (29181), 11137 states have internal predecessors, (29181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 29181 transitions. [2021-03-10 21:10:55,552 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 29181 transitions. Word has length 47 [2021-03-10 21:10:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:55,552 INFO L480 AbstractCegarLoop]: Abstraction has 11138 states and 29181 transitions. [2021-03-10 21:10:55,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 29181 transitions. [2021-03-10 21:10:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:55,558 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:55,558 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:55,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-03-10 21:10:55,759 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash 492700136, now seen corresponding path program 56 times [2021-03-10 21:10:55,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:55,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289928535] [2021-03-10 21:10:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:55,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289928535] [2021-03-10 21:10:55,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772137589] [2021-03-10 21:10:55,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:55,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:55,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:55,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:55,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:55,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:10:55,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481388726] [2021-03-10 21:10:55,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:10:55,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:55,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:10:55,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:10:55,906 INFO L87 Difference]: Start difference. First operand 11138 states and 29181 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:56,101 INFO L93 Difference]: Finished difference Result 13817 states and 34624 transitions. [2021-03-10 21:10:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:56,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:56,115 INFO L225 Difference]: With dead ends: 13817 [2021-03-10 21:10:56,116 INFO L226 Difference]: Without dead ends: 13817 [2021-03-10 21:10:56,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13817 states. [2021-03-10 21:10:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13817 to 10965. [2021-03-10 21:10:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10965 states, 10964 states have (on average 2.615468807004743) internal successors, (28676), 10964 states have internal predecessors, (28676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:56,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10965 states to 10965 states and 28676 transitions. [2021-03-10 21:10:56,272 INFO L78 Accepts]: Start accepts. Automaton has 10965 states and 28676 transitions. Word has length 47 [2021-03-10 21:10:56,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:56,272 INFO L480 AbstractCegarLoop]: Abstraction has 10965 states and 28676 transitions. [2021-03-10 21:10:56,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:56,273 INFO L276 IsEmpty]: Start isEmpty. Operand 10965 states and 28676 transitions. [2021-03-10 21:10:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:56,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:56,279 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:56,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:56,479 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:56,479 INFO L82 PathProgramCache]: Analyzing trace with hash 227806332, now seen corresponding path program 100 times [2021-03-10 21:10:56,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:56,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707767004] [2021-03-10 21:10:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:56,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707767004] [2021-03-10 21:10:56,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856044156] [2021-03-10 21:10:56,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:56,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:56,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:56,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:56,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:56,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:56,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:10:56,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361357621] [2021-03-10 21:10:56,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:56,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:56,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:56,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:56,623 INFO L87 Difference]: Start difference. First operand 10965 states and 28676 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:56,794 INFO L93 Difference]: Finished difference Result 12231 states and 31080 transitions. [2021-03-10 21:10:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:56,806 INFO L225 Difference]: With dead ends: 12231 [2021-03-10 21:10:56,806 INFO L226 Difference]: Without dead ends: 12213 [2021-03-10 21:10:56,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12213 states. [2021-03-10 21:10:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12213 to 10965. [2021-03-10 21:10:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10965 states, 10964 states have (on average 2.6145567311200293) internal successors, (28666), 10964 states have internal predecessors, (28666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10965 states to 10965 states and 28666 transitions. [2021-03-10 21:10:56,929 INFO L78 Accepts]: Start accepts. Automaton has 10965 states and 28666 transitions. Word has length 47 [2021-03-10 21:10:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:56,929 INFO L480 AbstractCegarLoop]: Abstraction has 10965 states and 28666 transitions. [2021-03-10 21:10:56,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:56,929 INFO L276 IsEmpty]: Start isEmpty. Operand 10965 states and 28666 transitions. [2021-03-10 21:10:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:56,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:56,935 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:57,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:57,136 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash -866264581, now seen corresponding path program 57 times [2021-03-10 21:10:57,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:57,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387677198] [2021-03-10 21:10:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:57,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387677198] [2021-03-10 21:10:57,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873326832] [2021-03-10 21:10:57,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:57,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:10:57,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:57,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:10:57,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:57,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:57,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 21 [2021-03-10 21:10:57,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888915761] [2021-03-10 21:10:57,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:10:57,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:57,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:10:57,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:10:57,403 INFO L87 Difference]: Start difference. First operand 10965 states and 28666 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:58,166 INFO L93 Difference]: Finished difference Result 13117 states and 33100 transitions. [2021-03-10 21:10:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:10:58,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:58,179 INFO L225 Difference]: With dead ends: 13117 [2021-03-10 21:10:58,179 INFO L226 Difference]: Without dead ends: 13051 [2021-03-10 21:10:58,179 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:10:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13051 states. [2021-03-10 21:10:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13051 to 11169. [2021-03-10 21:10:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11169 states, 11168 states have (on average 2.6111210601719197) internal successors, (29161), 11168 states have internal predecessors, (29161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11169 states to 11169 states and 29161 transitions. [2021-03-10 21:10:58,343 INFO L78 Accepts]: Start accepts. Automaton has 11169 states and 29161 transitions. Word has length 47 [2021-03-10 21:10:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:58,343 INFO L480 AbstractCegarLoop]: Abstraction has 11169 states and 29161 transitions. [2021-03-10 21:10:58,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:58,343 INFO L276 IsEmpty]: Start isEmpty. Operand 11169 states and 29161 transitions. [2021-03-10 21:10:58,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:58,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:58,349 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:58,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-03-10 21:10:58,556 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1875005858, now seen corresponding path program 101 times [2021-03-10 21:10:58,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:58,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152800340] [2021-03-10 21:10:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 38 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:58,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152800340] [2021-03-10 21:10:58,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653128263] [2021-03-10 21:10:58,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:58,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:10:58,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:58,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:58,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:58,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:58,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-03-10 21:10:58,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331099398] [2021-03-10 21:10:58,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:10:58,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:58,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:10:58,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:58,697 INFO L87 Difference]: Start difference. First operand 11169 states and 29161 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:58,865 INFO L93 Difference]: Finished difference Result 12909 states and 32563 transitions. [2021-03-10 21:10:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:58,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:58,878 INFO L225 Difference]: With dead ends: 12909 [2021-03-10 21:10:58,878 INFO L226 Difference]: Without dead ends: 12906 [2021-03-10 21:10:58,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:10:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2021-03-10 21:10:58,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 11155. [2021-03-10 21:10:58,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 11154 states have (on average 2.6095571095571097) internal successors, (29107), 11154 states have internal predecessors, (29107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 29107 transitions. [2021-03-10 21:10:59,009 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 29107 transitions. Word has length 47 [2021-03-10 21:10:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:59,009 INFO L480 AbstractCegarLoop]: Abstraction has 11155 states and 29107 transitions. [2021-03-10 21:10:59,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 29107 transitions. [2021-03-10 21:10:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:59,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:59,015 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:59,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:59,216 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:59,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2082068424, now seen corresponding path program 102 times [2021-03-10 21:10:59,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:59,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083790815] [2021-03-10 21:10:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:59,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083790815] [2021-03-10 21:10:59,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012198348] [2021-03-10 21:10:59,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:59,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:10:59,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:59,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:10:59,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:10:59,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:59,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:10:59,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891081859] [2021-03-10 21:10:59,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:59,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:59,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:59,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:59,352 INFO L87 Difference]: Start difference. First operand 11155 states and 29107 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:59,501 INFO L93 Difference]: Finished difference Result 12728 states and 32115 transitions. [2021-03-10 21:10:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:10:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:59,514 INFO L225 Difference]: With dead ends: 12728 [2021-03-10 21:10:59,514 INFO L226 Difference]: Without dead ends: 12710 [2021-03-10 21:10:59,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-03-10 21:10:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 11218. [2021-03-10 21:10:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11218 states, 11217 states have (on average 2.6064009984844434) internal successors, (29236), 11217 states have internal predecessors, (29236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11218 states to 11218 states and 29236 transitions. [2021-03-10 21:10:59,647 INFO L78 Accepts]: Start accepts. Automaton has 11218 states and 29236 transitions. Word has length 47 [2021-03-10 21:10:59,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:59,647 INFO L480 AbstractCegarLoop]: Abstraction has 11218 states and 29236 transitions. [2021-03-10 21:10:59,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 11218 states and 29236 transitions. [2021-03-10 21:10:59,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:10:59,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:59,653 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:59,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:59,854 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:59,854 INFO L82 PathProgramCache]: Analyzing trace with hash 634068411, now seen corresponding path program 103 times [2021-03-10 21:10:59,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:59,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869867916] [2021-03-10 21:10:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:10:59,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869867916] [2021-03-10 21:10:59,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870372858] [2021-03-10 21:10:59,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:59,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:10:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:00,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:00,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:11:00,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182097772] [2021-03-10 21:11:00,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:00,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:00,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:00,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:00,013 INFO L87 Difference]: Start difference. First operand 11218 states and 29236 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:00,461 INFO L93 Difference]: Finished difference Result 12000 states and 30668 transitions. [2021-03-10 21:11:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:00,474 INFO L225 Difference]: With dead ends: 12000 [2021-03-10 21:11:00,474 INFO L226 Difference]: Without dead ends: 11932 [2021-03-10 21:11:00,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11932 states. [2021-03-10 21:11:00,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11932 to 11181. [2021-03-10 21:11:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11181 states, 11180 states have (on average 2.6043828264758497) internal successors, (29117), 11180 states have internal predecessors, (29117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 29117 transitions. [2021-03-10 21:11:00,659 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 29117 transitions. Word has length 47 [2021-03-10 21:11:00,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:00,659 INFO L480 AbstractCegarLoop]: Abstraction has 11181 states and 29117 transitions. [2021-03-10 21:11:00,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 29117 transitions. [2021-03-10 21:11:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:00,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:00,666 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:00,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:00,866 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash 20532231, now seen corresponding path program 104 times [2021-03-10 21:11:00,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:00,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103931716] [2021-03-10 21:11:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:11:00,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103931716] [2021-03-10 21:11:00,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314889673] [2021-03-10 21:11:00,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:00,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:00,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:00,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:00,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:11:01,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:01,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:11:01,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265605526] [2021-03-10 21:11:01,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:01,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:01,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:01,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:01,032 INFO L87 Difference]: Start difference. First operand 11181 states and 29117 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:01,372 INFO L93 Difference]: Finished difference Result 12322 states and 31370 transitions. [2021-03-10 21:11:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:01,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:01,384 INFO L225 Difference]: With dead ends: 12322 [2021-03-10 21:11:01,384 INFO L226 Difference]: Without dead ends: 12274 [2021-03-10 21:11:01,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12274 states. [2021-03-10 21:11:01,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12274 to 11043. [2021-03-10 21:11:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11043 states, 11042 states have (on average 2.606411881905452) internal successors, (28780), 11042 states have internal predecessors, (28780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11043 states to 11043 states and 28780 transitions. [2021-03-10 21:11:01,512 INFO L78 Accepts]: Start accepts. Automaton has 11043 states and 28780 transitions. Word has length 47 [2021-03-10 21:11:01,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:01,512 INFO L480 AbstractCegarLoop]: Abstraction has 11043 states and 28780 transitions. [2021-03-10 21:11:01,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:01,512 INFO L276 IsEmpty]: Start isEmpty. Operand 11043 states and 28780 transitions. [2021-03-10 21:11:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:01,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:01,518 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:01,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-03-10 21:11:01,719 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:01,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:01,719 INFO L82 PathProgramCache]: Analyzing trace with hash -136767256, now seen corresponding path program 58 times [2021-03-10 21:11:01,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:01,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115785367] [2021-03-10 21:11:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:01,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115785367] [2021-03-10 21:11:01,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545547787] [2021-03-10 21:11:01,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:01,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:01,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:01,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:01,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:01,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:01,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:11:01,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796037541] [2021-03-10 21:11:01,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:01,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:01,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:01,857 INFO L87 Difference]: Start difference. First operand 11043 states and 28780 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:02,025 INFO L93 Difference]: Finished difference Result 13070 states and 32866 transitions. [2021-03-10 21:11:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:11:02,025 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:02,038 INFO L225 Difference]: With dead ends: 13070 [2021-03-10 21:11:02,039 INFO L226 Difference]: Without dead ends: 13050 [2021-03-10 21:11:02,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13050 states. [2021-03-10 21:11:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13050 to 11210. [2021-03-10 21:11:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11210 states, 11209 states have (on average 2.608707288785797) internal successors, (29241), 11209 states have internal predecessors, (29241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11210 states to 11210 states and 29241 transitions. [2021-03-10 21:11:02,176 INFO L78 Accepts]: Start accepts. Automaton has 11210 states and 29241 transitions. Word has length 47 [2021-03-10 21:11:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:02,176 INFO L480 AbstractCegarLoop]: Abstraction has 11210 states and 29241 transitions. [2021-03-10 21:11:02,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 11210 states and 29241 transitions. [2021-03-10 21:11:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:02,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:02,183 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:02,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:02,383 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:02,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:02,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2132517731, now seen corresponding path program 105 times [2021-03-10 21:11:02,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:02,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323918638] [2021-03-10 21:11:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:02,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323918638] [2021-03-10 21:11:02,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27933107] [2021-03-10 21:11:02,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:02,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:11:02,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:02,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:02,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:02,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:11:02,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778174335] [2021-03-10 21:11:02,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:02,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:02,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:02,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:02,537 INFO L87 Difference]: Start difference. First operand 11210 states and 29241 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:02,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:02,935 INFO L93 Difference]: Finished difference Result 13279 states and 33558 transitions. [2021-03-10 21:11:02,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:11:02,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:02,949 INFO L225 Difference]: With dead ends: 13279 [2021-03-10 21:11:02,949 INFO L226 Difference]: Without dead ends: 13237 [2021-03-10 21:11:02,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:11:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13237 states. [2021-03-10 21:11:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13237 to 11266. [2021-03-10 21:11:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11266 states, 11265 states have (on average 2.6093209054593873) internal successors, (29394), 11265 states have internal predecessors, (29394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11266 states to 11266 states and 29394 transitions. [2021-03-10 21:11:03,103 INFO L78 Accepts]: Start accepts. Automaton has 11266 states and 29394 transitions. Word has length 47 [2021-03-10 21:11:03,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:03,103 INFO L480 AbstractCegarLoop]: Abstraction has 11266 states and 29394 transitions. [2021-03-10 21:11:03,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 11266 states and 29394 transitions. [2021-03-10 21:11:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:03,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:03,110 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:03,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:03,310 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash -599958622, now seen corresponding path program 106 times [2021-03-10 21:11:03,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:03,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799117341] [2021-03-10 21:11:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:03,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799117341] [2021-03-10 21:11:03,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392522588] [2021-03-10 21:11:03,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:11:03,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:03,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:03,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:03,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:03,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:11:03,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47836557] [2021-03-10 21:11:03,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:03,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:03,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:03,468 INFO L87 Difference]: Start difference. First operand 11266 states and 29394 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:03,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:03,658 INFO L93 Difference]: Finished difference Result 12930 states and 32620 transitions. [2021-03-10 21:11:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:11:03,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:03,671 INFO L225 Difference]: With dead ends: 12930 [2021-03-10 21:11:03,671 INFO L226 Difference]: Without dead ends: 12906 [2021-03-10 21:11:03,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:03,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2021-03-10 21:11:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 11030. [2021-03-10 21:11:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11030 states, 11029 states have (on average 2.6018678030646476) internal successors, (28696), 11029 states have internal predecessors, (28696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 28696 transitions. [2021-03-10 21:11:03,804 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 28696 transitions. Word has length 47 [2021-03-10 21:11:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:03,804 INFO L480 AbstractCegarLoop]: Abstraction has 11030 states and 28696 transitions. [2021-03-10 21:11:03,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 28696 transitions. [2021-03-10 21:11:03,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:03,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:03,810 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:04,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-03-10 21:11:04,011 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:04,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1977681197, now seen corresponding path program 107 times [2021-03-10 21:11:04,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:04,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228957564] [2021-03-10 21:11:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:04,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228957564] [2021-03-10 21:11:04,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683144032] [2021-03-10 21:11:04,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:04,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:11:04,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:04,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:04,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:04,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:04,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:11:04,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131609330] [2021-03-10 21:11:04,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:11:04,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:11:04,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:04,175 INFO L87 Difference]: Start difference. First operand 11030 states and 28696 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:04,593 INFO L93 Difference]: Finished difference Result 13230 states and 33203 transitions. [2021-03-10 21:11:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:11:04,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:04,606 INFO L225 Difference]: With dead ends: 13230 [2021-03-10 21:11:04,607 INFO L226 Difference]: Without dead ends: 13176 [2021-03-10 21:11:04,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:11:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13176 states. [2021-03-10 21:11:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13176 to 11010. [2021-03-10 21:11:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11010 states, 11009 states have (on average 2.5991461531474247) internal successors, (28614), 11009 states have internal predecessors, (28614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11010 states to 11010 states and 28614 transitions. [2021-03-10 21:11:04,734 INFO L78 Accepts]: Start accepts. Automaton has 11010 states and 28614 transitions. Word has length 47 [2021-03-10 21:11:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:04,734 INFO L480 AbstractCegarLoop]: Abstraction has 11010 states and 28614 transitions. [2021-03-10 21:11:04,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 11010 states and 28614 transitions. [2021-03-10 21:11:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:04,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:04,741 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:04,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:04,941 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1457344172, now seen corresponding path program 59 times [2021-03-10 21:11:04,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:04,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722608447] [2021-03-10 21:11:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 73 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:04,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722608447] [2021-03-10 21:11:04,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966068207] [2021-03-10 21:11:04,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:05,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:11:05,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:05,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:05,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:05,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:05,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 17 [2021-03-10 21:11:05,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573215389] [2021-03-10 21:11:05,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:11:05,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:05,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:11:05,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:11:05,145 INFO L87 Difference]: Start difference. First operand 11010 states and 28614 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:05,504 INFO L93 Difference]: Finished difference Result 16122 states and 40042 transitions. [2021-03-10 21:11:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:11:05,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:05,521 INFO L225 Difference]: With dead ends: 16122 [2021-03-10 21:11:05,521 INFO L226 Difference]: Without dead ends: 16122 [2021-03-10 21:11:05,521 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:11:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16122 states. [2021-03-10 21:11:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16122 to 11196. [2021-03-10 21:11:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11196 states, 11195 states have (on average 2.6068780705672174) internal successors, (29184), 11195 states have internal predecessors, (29184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11196 states to 11196 states and 29184 transitions. [2021-03-10 21:11:05,703 INFO L78 Accepts]: Start accepts. Automaton has 11196 states and 29184 transitions. Word has length 47 [2021-03-10 21:11:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:05,703 INFO L480 AbstractCegarLoop]: Abstraction has 11196 states and 29184 transitions. [2021-03-10 21:11:05,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:05,703 INFO L276 IsEmpty]: Start isEmpty. Operand 11196 states and 29184 transitions. [2021-03-10 21:11:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:05,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:05,710 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:05,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-03-10 21:11:05,910 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:05,910 INFO L82 PathProgramCache]: Analyzing trace with hash -180228284, now seen corresponding path program 60 times [2021-03-10 21:11:05,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:05,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550360018] [2021-03-10 21:11:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:05,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550360018] [2021-03-10 21:11:05,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164356069] [2021-03-10 21:11:05,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:05,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 21:11:05,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:05,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:05,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:06,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:06,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:11:06,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037729673] [2021-03-10 21:11:06,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:11:06,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:06,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:11:06,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:06,078 INFO L87 Difference]: Start difference. First operand 11196 states and 29184 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:06,312 INFO L93 Difference]: Finished difference Result 15167 states and 37748 transitions. [2021-03-10 21:11:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:11:06,313 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:06,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:06,328 INFO L225 Difference]: With dead ends: 15167 [2021-03-10 21:11:06,328 INFO L226 Difference]: Without dead ends: 15167 [2021-03-10 21:11:06,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:11:06,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15167 states. [2021-03-10 21:11:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15167 to 11204. [2021-03-10 21:11:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11204 states, 11203 states have (on average 2.6068017495313756) internal successors, (29204), 11203 states have internal predecessors, (29204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11204 states to 11204 states and 29204 transitions. [2021-03-10 21:11:06,472 INFO L78 Accepts]: Start accepts. Automaton has 11204 states and 29204 transitions. Word has length 47 [2021-03-10 21:11:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:06,472 INFO L480 AbstractCegarLoop]: Abstraction has 11204 states and 29204 transitions. [2021-03-10 21:11:06,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:06,473 INFO L276 IsEmpty]: Start isEmpty. Operand 11204 states and 29204 transitions. [2021-03-10 21:11:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:06,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:06,479 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:06,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-03-10 21:11:06,679 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:06,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:06,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1870223448, now seen corresponding path program 61 times [2021-03-10 21:11:06,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:06,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225141791] [2021-03-10 21:11:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:06,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225141791] [2021-03-10 21:11:06,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067395510] [2021-03-10 21:11:06,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:06,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:06,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:06,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:06,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:11:06,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752697070] [2021-03-10 21:11:06,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:06,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:06,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:06,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:06,836 INFO L87 Difference]: Start difference. First operand 11204 states and 29204 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:07,061 INFO L93 Difference]: Finished difference Result 13730 states and 34377 transitions. [2021-03-10 21:11:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:11:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:07,076 INFO L225 Difference]: With dead ends: 13730 [2021-03-10 21:11:07,076 INFO L226 Difference]: Without dead ends: 13730 [2021-03-10 21:11:07,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:11:07,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13730 states. [2021-03-10 21:11:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13730 to 11017. [2021-03-10 21:11:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11017 states, 11016 states have (on average 2.605392156862745) internal successors, (28701), 11016 states have internal predecessors, (28701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11017 states to 11017 states and 28701 transitions. [2021-03-10 21:11:07,214 INFO L78 Accepts]: Start accepts. Automaton has 11017 states and 28701 transitions. Word has length 47 [2021-03-10 21:11:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:07,214 INFO L480 AbstractCegarLoop]: Abstraction has 11017 states and 28701 transitions. [2021-03-10 21:11:07,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand 11017 states and 28701 transitions. [2021-03-10 21:11:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:07,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:07,221 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:07,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:07,421 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:07,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1591078520, now seen corresponding path program 108 times [2021-03-10 21:11:07,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:07,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341863131] [2021-03-10 21:11:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:07,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341863131] [2021-03-10 21:11:07,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810831589] [2021-03-10 21:11:07,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:07,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:11:07,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:07,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:07,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:07,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:07,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:11:07,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371701203] [2021-03-10 21:11:07,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:11:07,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:07,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:11:07,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:07,573 INFO L87 Difference]: Start difference. First operand 11017 states and 28701 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:07,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:07,757 INFO L93 Difference]: Finished difference Result 12484 states and 31576 transitions. [2021-03-10 21:11:07,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:11:07,757 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:07,768 INFO L225 Difference]: With dead ends: 12484 [2021-03-10 21:11:07,768 INFO L226 Difference]: Without dead ends: 12457 [2021-03-10 21:11:07,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:11:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12457 states. [2021-03-10 21:11:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12457 to 11017. [2021-03-10 21:11:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11017 states, 11016 states have (on average 2.604847494553377) internal successors, (28695), 11016 states have internal predecessors, (28695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11017 states to 11017 states and 28695 transitions. [2021-03-10 21:11:07,927 INFO L78 Accepts]: Start accepts. Automaton has 11017 states and 28695 transitions. Word has length 47 [2021-03-10 21:11:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:07,927 INFO L480 AbstractCegarLoop]: Abstraction has 11017 states and 28695 transitions. [2021-03-10 21:11:07,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 11017 states and 28695 transitions. [2021-03-10 21:11:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:07,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:07,933 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:08,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-03-10 21:11:08,133 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:08,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:08,134 INFO L82 PathProgramCache]: Analyzing trace with hash 890204437, now seen corresponding path program 62 times [2021-03-10 21:11:08,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:08,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701197260] [2021-03-10 21:11:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:08,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701197260] [2021-03-10 21:11:08,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567859172] [2021-03-10 21:11:08,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:08,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:08,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:08,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:08,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:08,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:08,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:11:08,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942535166] [2021-03-10 21:11:08,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:08,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:08,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:08,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:08,286 INFO L87 Difference]: Start difference. First operand 11017 states and 28695 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:08,596 INFO L93 Difference]: Finished difference Result 12299 states and 31344 transitions. [2021-03-10 21:11:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:08,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:08,608 INFO L225 Difference]: With dead ends: 12299 [2021-03-10 21:11:08,608 INFO L226 Difference]: Without dead ends: 12272 [2021-03-10 21:11:08,608 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12272 states. [2021-03-10 21:11:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12272 to 11180. [2021-03-10 21:11:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11180 states, 11179 states have (on average 2.60211110117184) internal successors, (29089), 11179 states have internal predecessors, (29089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 29089 transitions. [2021-03-10 21:11:08,736 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 29089 transitions. Word has length 47 [2021-03-10 21:11:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:08,736 INFO L480 AbstractCegarLoop]: Abstraction has 11180 states and 29089 transitions. [2021-03-10 21:11:08,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 29089 transitions. [2021-03-10 21:11:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:08,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:08,743 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:08,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:08,943 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash -663492420, now seen corresponding path program 109 times [2021-03-10 21:11:08,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:08,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380710202] [2021-03-10 21:11:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:11:08,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380710202] [2021-03-10 21:11:08,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182078724] [2021-03-10 21:11:08,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:09,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:09,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:11:09,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:09,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:11:09,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420011601] [2021-03-10 21:11:09,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:11:09,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:09,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:11:09,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:11:09,071 INFO L87 Difference]: Start difference. First operand 11180 states and 29089 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:09,199 INFO L93 Difference]: Finished difference Result 12853 states and 32381 transitions. [2021-03-10 21:11:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:11:09,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:09,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:09,212 INFO L225 Difference]: With dead ends: 12853 [2021-03-10 21:11:09,212 INFO L226 Difference]: Without dead ends: 12850 [2021-03-10 21:11:09,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12850 states. [2021-03-10 21:11:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12850 to 11172. [2021-03-10 21:11:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11172 states, 11171 states have (on average 2.6009309820069824) internal successors, (29055), 11171 states have internal predecessors, (29055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11172 states to 11172 states and 29055 transitions. [2021-03-10 21:11:09,346 INFO L78 Accepts]: Start accepts. Automaton has 11172 states and 29055 transitions. Word has length 47 [2021-03-10 21:11:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:09,346 INFO L480 AbstractCegarLoop]: Abstraction has 11172 states and 29055 transitions. [2021-03-10 21:11:09,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 11172 states and 29055 transitions. [2021-03-10 21:11:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:09,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:09,352 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:09,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:09,553 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:09,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1904429867, now seen corresponding path program 110 times [2021-03-10 21:11:09,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:09,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941546325] [2021-03-10 21:11:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:09,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941546325] [2021-03-10 21:11:09,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269887485] [2021-03-10 21:11:09,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:09,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:09,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:09,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:09,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:09,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:11:09,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173920310] [2021-03-10 21:11:09,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:09,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:09,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:09,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:09,717 INFO L87 Difference]: Start difference. First operand 11172 states and 29055 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:10,129 INFO L93 Difference]: Finished difference Result 11857 states and 30318 transitions. [2021-03-10 21:11:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:10,141 INFO L225 Difference]: With dead ends: 11857 [2021-03-10 21:11:10,141 INFO L226 Difference]: Without dead ends: 11781 [2021-03-10 21:11:10,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11781 states. [2021-03-10 21:11:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11781 to 11141. [2021-03-10 21:11:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11141 states, 11140 states have (on average 2.5981149012567326) internal successors, (28943), 11140 states have internal predecessors, (28943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11141 states to 11141 states and 28943 transitions. [2021-03-10 21:11:10,268 INFO L78 Accepts]: Start accepts. Automaton has 11141 states and 28943 transitions. Word has length 47 [2021-03-10 21:11:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:10,268 INFO L480 AbstractCegarLoop]: Abstraction has 11141 states and 28943 transitions. [2021-03-10 21:11:10,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:10,268 INFO L276 IsEmpty]: Start isEmpty. Operand 11141 states and 28943 transitions. [2021-03-10 21:11:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:10,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:10,274 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:10,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:10,475 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:10,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1777001249, now seen corresponding path program 111 times [2021-03-10 21:11:10,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:10,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296613935] [2021-03-10 21:11:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:11:10,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296613935] [2021-03-10 21:11:10,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734339021] [2021-03-10 21:11:10,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:10,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-03-10 21:11:10,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:10,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:10,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:11:10,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:10,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:11:10,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692631753] [2021-03-10 21:11:10,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:10,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:10,673 INFO L87 Difference]: Start difference. First operand 11141 states and 28943 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:10,983 INFO L93 Difference]: Finished difference Result 12215 states and 31099 transitions. [2021-03-10 21:11:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:10,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:10,995 INFO L225 Difference]: With dead ends: 12215 [2021-03-10 21:11:10,995 INFO L226 Difference]: Without dead ends: 12170 [2021-03-10 21:11:10,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2021-03-10 21:11:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11129. [2021-03-10 21:11:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11129 states, 11128 states have (on average 2.598220704529116) internal successors, (28913), 11128 states have internal predecessors, (28913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11129 states to 11129 states and 28913 transitions. [2021-03-10 21:11:11,124 INFO L78 Accepts]: Start accepts. Automaton has 11129 states and 28913 transitions. Word has length 47 [2021-03-10 21:11:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:11,125 INFO L480 AbstractCegarLoop]: Abstraction has 11129 states and 28913 transitions. [2021-03-10 21:11:11,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 11129 states and 28913 transitions. [2021-03-10 21:11:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:11,131 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:11,131 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:11,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-03-10 21:11:11,331 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:11,332 INFO L82 PathProgramCache]: Analyzing trace with hash 128643746, now seen corresponding path program 112 times [2021-03-10 21:11:11,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:11,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675812099] [2021-03-10 21:11:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:11,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675812099] [2021-03-10 21:11:11,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40374320] [2021-03-10 21:11:11,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:11,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:11,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:11,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:11,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:11,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:11:11,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548593590] [2021-03-10 21:11:11,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:11,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:11,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:11,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:11,465 INFO L87 Difference]: Start difference. First operand 11129 states and 28913 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:11,607 INFO L93 Difference]: Finished difference Result 12836 states and 32280 transitions. [2021-03-10 21:11:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:11:11,607 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:11,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:11,620 INFO L225 Difference]: With dead ends: 12836 [2021-03-10 21:11:11,620 INFO L226 Difference]: Without dead ends: 12827 [2021-03-10 21:11:11,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:11,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12827 states. [2021-03-10 21:11:11,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12827 to 11129. [2021-03-10 21:11:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11129 states, 11128 states have (on average 2.5973220704529116) internal successors, (28903), 11128 states have internal predecessors, (28903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:11,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11129 states to 11129 states and 28903 transitions. [2021-03-10 21:11:11,750 INFO L78 Accepts]: Start accepts. Automaton has 11129 states and 28903 transitions. Word has length 47 [2021-03-10 21:11:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:11,750 INFO L480 AbstractCegarLoop]: Abstraction has 11129 states and 28903 transitions. [2021-03-10 21:11:11,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 11129 states and 28903 transitions. [2021-03-10 21:11:11,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:11,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:11,756 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:11,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-03-10 21:11:11,957 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash -376048713, now seen corresponding path program 113 times [2021-03-10 21:11:11,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:11,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511725486] [2021-03-10 21:11:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:12,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511725486] [2021-03-10 21:11:12,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076741981] [2021-03-10 21:11:12,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:12,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-03-10 21:11:12,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:12,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:12,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:12,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:11:12,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448948163] [2021-03-10 21:11:12,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:12,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:12,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:12,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:12,129 INFO L87 Difference]: Start difference. First operand 11129 states and 28903 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:12,582 INFO L93 Difference]: Finished difference Result 13386 states and 33648 transitions. [2021-03-10 21:11:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:11:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:12,595 INFO L225 Difference]: With dead ends: 13386 [2021-03-10 21:11:12,596 INFO L226 Difference]: Without dead ends: 13332 [2021-03-10 21:11:12,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:11:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13332 states. [2021-03-10 21:11:12,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13332 to 11225. [2021-03-10 21:11:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11225 states, 11224 states have (on average 2.598182466143977) internal successors, (29162), 11224 states have internal predecessors, (29162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11225 states to 11225 states and 29162 transitions. [2021-03-10 21:11:12,730 INFO L78 Accepts]: Start accepts. Automaton has 11225 states and 29162 transitions. Word has length 47 [2021-03-10 21:11:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:12,730 INFO L480 AbstractCegarLoop]: Abstraction has 11225 states and 29162 transitions. [2021-03-10 21:11:12,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 11225 states and 29162 transitions. [2021-03-10 21:11:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:12,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:12,736 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:12,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:12,936 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:12,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1156510396, now seen corresponding path program 114 times [2021-03-10 21:11:12,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:12,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881715221] [2021-03-10 21:11:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:12,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881715221] [2021-03-10 21:11:12,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846072162] [2021-03-10 21:11:12,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:13,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:11:13,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:13,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:13,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:13,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:13,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:11:13,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838425709] [2021-03-10 21:11:13,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:13,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:13,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:13,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:13,140 INFO L87 Difference]: Start difference. First operand 11225 states and 29162 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:13,300 INFO L93 Difference]: Finished difference Result 13001 states and 32659 transitions. [2021-03-10 21:11:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:11:13,301 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:13,314 INFO L225 Difference]: With dead ends: 13001 [2021-03-10 21:11:13,314 INFO L226 Difference]: Without dead ends: 12977 [2021-03-10 21:11:13,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12977 states. [2021-03-10 21:11:13,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12977 to 11225. [2021-03-10 21:11:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11225 states, 11224 states have (on average 2.596935138987883) internal successors, (29148), 11224 states have internal predecessors, (29148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:13,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11225 states to 11225 states and 29148 transitions. [2021-03-10 21:11:13,480 INFO L78 Accepts]: Start accepts. Automaton has 11225 states and 29148 transitions. Word has length 47 [2021-03-10 21:11:13,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:13,480 INFO L480 AbstractCegarLoop]: Abstraction has 11225 states and 29148 transitions. [2021-03-10 21:11:13,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 11225 states and 29148 transitions. [2021-03-10 21:11:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:13,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:13,487 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:13,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-03-10 21:11:13,687 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:13,687 INFO L82 PathProgramCache]: Analyzing trace with hash -221212179, now seen corresponding path program 115 times [2021-03-10 21:11:13,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:13,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808758578] [2021-03-10 21:11:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:13,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808758578] [2021-03-10 21:11:13,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326397068] [2021-03-10 21:11:13,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:13,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:13,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:13,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:13,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:11:13,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325907367] [2021-03-10 21:11:13,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:11:13,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:13,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:11:13,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:13,857 INFO L87 Difference]: Start difference. First operand 11225 states and 29148 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:14,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:14,454 INFO L93 Difference]: Finished difference Result 15144 states and 37565 transitions. [2021-03-10 21:11:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:11:14,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:14,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:14,470 INFO L225 Difference]: With dead ends: 15144 [2021-03-10 21:11:14,470 INFO L226 Difference]: Without dead ends: 15030 [2021-03-10 21:11:14,470 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:11:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15030 states. [2021-03-10 21:11:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15030 to 11322. [2021-03-10 21:11:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11321 states have (on average 2.5982687041780763) internal successors, (29415), 11321 states have internal predecessors, (29415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 29415 transitions. [2021-03-10 21:11:14,617 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 29415 transitions. Word has length 47 [2021-03-10 21:11:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:14,617 INFO L480 AbstractCegarLoop]: Abstraction has 11322 states and 29415 transitions. [2021-03-10 21:11:14,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 29415 transitions. [2021-03-10 21:11:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:14,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:14,623 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:14,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:14,824 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:14,824 INFO L82 PathProgramCache]: Analyzing trace with hash 165390498, now seen corresponding path program 116 times [2021-03-10 21:11:14,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:14,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538128441] [2021-03-10 21:11:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:14,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538128441] [2021-03-10 21:11:14,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143034160] [2021-03-10 21:11:14,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:14,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:14,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:14,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:14,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:14,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:11:14,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227575729] [2021-03-10 21:11:14,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:11:14,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:14,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:11:14,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:14,974 INFO L87 Difference]: Start difference. First operand 11322 states and 29415 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:15,142 INFO L93 Difference]: Finished difference Result 13149 states and 33004 transitions. [2021-03-10 21:11:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:11:15,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:15,155 INFO L225 Difference]: With dead ends: 13149 [2021-03-10 21:11:15,156 INFO L226 Difference]: Without dead ends: 13116 [2021-03-10 21:11:15,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13116 states. [2021-03-10 21:11:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13116 to 11094. [2021-03-10 21:11:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.591724510952853) internal successors, (28750), 11093 states have internal predecessors, (28750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28750 transitions. [2021-03-10 21:11:15,288 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28750 transitions. Word has length 47 [2021-03-10 21:11:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:15,288 INFO L480 AbstractCegarLoop]: Abstraction has 11094 states and 28750 transitions. [2021-03-10 21:11:15,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28750 transitions. [2021-03-10 21:11:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:15,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:15,295 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:15,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:15,495 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:15,495 INFO L82 PathProgramCache]: Analyzing trace with hash -280903689, now seen corresponding path program 117 times [2021-03-10 21:11:15,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:15,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14877586] [2021-03-10 21:11:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:15,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14877586] [2021-03-10 21:11:15,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673365402] [2021-03-10 21:11:15,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:15,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 21:11:15,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:15,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:15,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:15,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:15,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:11:15,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639481201] [2021-03-10 21:11:15,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:15,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:15,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:15,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:15,672 INFO L87 Difference]: Start difference. First operand 11094 states and 28750 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:16,137 INFO L93 Difference]: Finished difference Result 13895 states and 34477 transitions. [2021-03-10 21:11:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:11:16,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:16,151 INFO L225 Difference]: With dead ends: 13895 [2021-03-10 21:11:16,152 INFO L226 Difference]: Without dead ends: 13739 [2021-03-10 21:11:16,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:11:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2021-03-10 21:11:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 10883. [2021-03-10 21:11:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10883 states, 10882 states have (on average 2.5861054953133613) internal successors, (28142), 10882 states have internal predecessors, (28142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10883 states to 10883 states and 28142 transitions. [2021-03-10 21:11:16,305 INFO L78 Accepts]: Start accepts. Automaton has 10883 states and 28142 transitions. Word has length 47 [2021-03-10 21:11:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:16,305 INFO L480 AbstractCegarLoop]: Abstraction has 10883 states and 28142 transitions. [2021-03-10 21:11:16,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 10883 states and 28142 transitions. [2021-03-10 21:11:16,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:16,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:16,312 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:16,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-03-10 21:11:16,512 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:16,512 INFO L82 PathProgramCache]: Analyzing trace with hash -518965206, now seen corresponding path program 63 times [2021-03-10 21:11:16,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:16,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165315902] [2021-03-10 21:11:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:16,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165315902] [2021-03-10 21:11:16,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712077567] [2021-03-10 21:11:16,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:16,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 21:11:16,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:16,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:16,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:11:16,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993306903] [2021-03-10 21:11:16,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:16,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:16,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:16,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:16,652 INFO L87 Difference]: Start difference. First operand 10883 states and 28142 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:16,827 INFO L93 Difference]: Finished difference Result 12858 states and 32283 transitions. [2021-03-10 21:11:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:11:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:16,840 INFO L225 Difference]: With dead ends: 12858 [2021-03-10 21:11:16,840 INFO L226 Difference]: Without dead ends: 12842 [2021-03-10 21:11:16,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12842 states. [2021-03-10 21:11:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12842 to 11135. [2021-03-10 21:11:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11135 states, 11134 states have (on average 2.589994611101132) internal successors, (28837), 11134 states have internal predecessors, (28837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11135 states to 11135 states and 28837 transitions. [2021-03-10 21:11:16,981 INFO L78 Accepts]: Start accepts. Automaton has 11135 states and 28837 transitions. Word has length 47 [2021-03-10 21:11:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:16,981 INFO L480 AbstractCegarLoop]: Abstraction has 11135 states and 28837 transitions. [2021-03-10 21:11:16,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 11135 states and 28837 transitions. [2021-03-10 21:11:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:16,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:16,988 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:17,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:17,188 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1140845616, now seen corresponding path program 64 times [2021-03-10 21:11:17,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:17,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584107645] [2021-03-10 21:11:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:17,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584107645] [2021-03-10 21:11:17,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955577455] [2021-03-10 21:11:17,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:17,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:17,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:17,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:17,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:17,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:17,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:11:17,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561947607] [2021-03-10 21:11:17,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:17,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:17,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:17,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:17,329 INFO L87 Difference]: Start difference. First operand 11135 states and 28837 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:17,527 INFO L93 Difference]: Finished difference Result 15165 states and 37701 transitions. [2021-03-10 21:11:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:11:17,528 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:17,543 INFO L225 Difference]: With dead ends: 15165 [2021-03-10 21:11:17,543 INFO L226 Difference]: Without dead ends: 15165 [2021-03-10 21:11:17,543 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15165 states. [2021-03-10 21:11:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15165 to 11144. [2021-03-10 21:11:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11144 states, 11143 states have (on average 2.590325765054294) internal successors, (28864), 11143 states have internal predecessors, (28864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 28864 transitions. [2021-03-10 21:11:17,686 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 28864 transitions. Word has length 47 [2021-03-10 21:11:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:17,686 INFO L480 AbstractCegarLoop]: Abstraction has 11144 states and 28864 transitions. [2021-03-10 21:11:17,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 28864 transitions. [2021-03-10 21:11:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:17,693 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:17,693 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:17,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-03-10 21:11:17,893 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:17,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1516549224, now seen corresponding path program 65 times [2021-03-10 21:11:17,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:17,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230251269] [2021-03-10 21:11:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:17,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230251269] [2021-03-10 21:11:17,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335961965] [2021-03-10 21:11:17,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:17,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:11:17,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:18,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:18,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 19 [2021-03-10 21:11:18,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374331516] [2021-03-10 21:11:18,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:11:18,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:18,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:11:18,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:11:18,112 INFO L87 Difference]: Start difference. First operand 11144 states and 28864 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:18,555 INFO L93 Difference]: Finished difference Result 16556 states and 40982 transitions. [2021-03-10 21:11:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:11:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:18,573 INFO L225 Difference]: With dead ends: 16556 [2021-03-10 21:11:18,573 INFO L226 Difference]: Without dead ends: 16556 [2021-03-10 21:11:18,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=369, Invalid=623, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:11:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16556 states. [2021-03-10 21:11:18,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16556 to 11167. [2021-03-10 21:11:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11167 states, 11166 states have (on average 2.5914382948235715) internal successors, (28936), 11166 states have internal predecessors, (28936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11167 states to 11167 states and 28936 transitions. [2021-03-10 21:11:18,729 INFO L78 Accepts]: Start accepts. Automaton has 11167 states and 28936 transitions. Word has length 47 [2021-03-10 21:11:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:18,729 INFO L480 AbstractCegarLoop]: Abstraction has 11167 states and 28936 transitions. [2021-03-10 21:11:18,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 11167 states and 28936 transitions. [2021-03-10 21:11:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:18,735 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:18,735 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:18,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:18,935 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:18,936 INFO L82 PathProgramCache]: Analyzing trace with hash -173445940, now seen corresponding path program 66 times [2021-03-10 21:11:18,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:18,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275523503] [2021-03-10 21:11:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:19,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275523503] [2021-03-10 21:11:19,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329160741] [2021-03-10 21:11:19,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:19,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 21:11:19,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:19,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:19,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:19,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:19,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:11:19,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903043032] [2021-03-10 21:11:19,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:19,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:19,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:19,100 INFO L87 Difference]: Start difference. First operand 11167 states and 28936 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:19,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:19,394 INFO L93 Difference]: Finished difference Result 14888 states and 37060 transitions. [2021-03-10 21:11:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:11:19,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:19,410 INFO L225 Difference]: With dead ends: 14888 [2021-03-10 21:11:19,410 INFO L226 Difference]: Without dead ends: 14888 [2021-03-10 21:11:19,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:11:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2021-03-10 21:11:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 11184. [2021-03-10 21:11:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11184 states, 11183 states have (on average 2.591969954395064) internal successors, (28986), 11183 states have internal predecessors, (28986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11184 states to 11184 states and 28986 transitions. [2021-03-10 21:11:19,554 INFO L78 Accepts]: Start accepts. Automaton has 11184 states and 28986 transitions. Word has length 47 [2021-03-10 21:11:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:19,554 INFO L480 AbstractCegarLoop]: Abstraction has 11184 states and 28986 transitions. [2021-03-10 21:11:19,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 11184 states and 28986 transitions. [2021-03-10 21:11:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:19,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:19,560 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:19,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-03-10 21:11:19,761 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:19,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:19,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1212732952, now seen corresponding path program 67 times [2021-03-10 21:11:19,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:19,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397621528] [2021-03-10 21:11:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:19,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397621528] [2021-03-10 21:11:19,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728027932] [2021-03-10 21:11:19,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:19,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:19,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:19,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:11:19,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078056747] [2021-03-10 21:11:19,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:11:19,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:19,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:11:19,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:19,930 INFO L87 Difference]: Start difference. First operand 11184 states and 28986 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:20,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:20,193 INFO L93 Difference]: Finished difference Result 13391 states and 33516 transitions. [2021-03-10 21:11:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:11:20,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:20,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:20,208 INFO L225 Difference]: With dead ends: 13391 [2021-03-10 21:11:20,208 INFO L226 Difference]: Without dead ends: 13391 [2021-03-10 21:11:20,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:11:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13391 states. [2021-03-10 21:11:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13391 to 10817. [2021-03-10 21:11:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10817 states, 10816 states have (on average 2.58801775147929) internal successors, (27992), 10816 states have internal predecessors, (27992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10817 states to 10817 states and 27992 transitions. [2021-03-10 21:11:20,342 INFO L78 Accepts]: Start accepts. Automaton has 10817 states and 27992 transitions. Word has length 47 [2021-03-10 21:11:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:20,342 INFO L480 AbstractCegarLoop]: Abstraction has 10817 states and 27992 transitions. [2021-03-10 21:11:20,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 10817 states and 27992 transitions. [2021-03-10 21:11:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:20,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:20,348 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:20,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:20,549 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1612669180, now seen corresponding path program 118 times [2021-03-10 21:11:20,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:20,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282017245] [2021-03-10 21:11:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:20,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282017245] [2021-03-10 21:11:20,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679782400] [2021-03-10 21:11:20,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:20,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:20,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:20,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:20,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:11:20,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208813564] [2021-03-10 21:11:20,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:20,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:20,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:20,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:20,712 INFO L87 Difference]: Start difference. First operand 10817 states and 27992 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:20,891 INFO L93 Difference]: Finished difference Result 12350 states and 31045 transitions. [2021-03-10 21:11:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:11:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:20,904 INFO L225 Difference]: With dead ends: 12350 [2021-03-10 21:11:20,904 INFO L226 Difference]: Without dead ends: 12314 [2021-03-10 21:11:20,904 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:11:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12314 states. [2021-03-10 21:11:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12314 to 10817. [2021-03-10 21:11:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10817 states, 10816 states have (on average 2.5874630177514795) internal successors, (27986), 10816 states have internal predecessors, (27986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10817 states to 10817 states and 27986 transitions. [2021-03-10 21:11:21,028 INFO L78 Accepts]: Start accepts. Automaton has 10817 states and 27986 transitions. Word has length 47 [2021-03-10 21:11:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:21,028 INFO L480 AbstractCegarLoop]: Abstraction has 10817 states and 27986 transitions. [2021-03-10 21:11:21,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 10817 states and 27986 transitions. [2021-03-10 21:11:21,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:21,034 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:21,034 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:21,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:21,235 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2022814789, now seen corresponding path program 68 times [2021-03-10 21:11:21,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:21,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089339234] [2021-03-10 21:11:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:21,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089339234] [2021-03-10 21:11:21,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198296311] [2021-03-10 21:11:21,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:21,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:21,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:21,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:21,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:21,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:11:21,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313874818] [2021-03-10 21:11:21,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:21,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:21,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:21,401 INFO L87 Difference]: Start difference. First operand 10817 states and 27986 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:21,728 INFO L93 Difference]: Finished difference Result 11869 states and 30137 transitions. [2021-03-10 21:11:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:21,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:21,740 INFO L225 Difference]: With dead ends: 11869 [2021-03-10 21:11:21,740 INFO L226 Difference]: Without dead ends: 11852 [2021-03-10 21:11:21,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11852 states. [2021-03-10 21:11:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11852 to 10948. [2021-03-10 21:11:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10948 states, 10947 states have (on average 2.5845437106056455) internal successors, (28293), 10947 states have internal predecessors, (28293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10948 states to 10948 states and 28293 transitions. [2021-03-10 21:11:21,865 INFO L78 Accepts]: Start accepts. Automaton has 10948 states and 28293 transitions. Word has length 47 [2021-03-10 21:11:21,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:21,865 INFO L480 AbstractCegarLoop]: Abstraction has 10948 states and 28293 transitions. [2021-03-10 21:11:21,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand 10948 states and 28293 transitions. [2021-03-10 21:11:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:21,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:21,871 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:22,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-03-10 21:11:22,072 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:22,072 INFO L82 PathProgramCache]: Analyzing trace with hash 925518216, now seen corresponding path program 119 times [2021-03-10 21:11:22,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:22,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956232106] [2021-03-10 21:11:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:11:22,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956232106] [2021-03-10 21:11:22,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283003440] [2021-03-10 21:11:22,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:22,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:11:22,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:22,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:22,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:22,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:22,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-03-10 21:11:22,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789213710] [2021-03-10 21:11:22,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:22,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:22,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:22,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:22,237 INFO L87 Difference]: Start difference. First operand 10948 states and 28293 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:22,430 INFO L93 Difference]: Finished difference Result 12917 states and 32220 transitions. [2021-03-10 21:11:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:11:22,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:22,444 INFO L225 Difference]: With dead ends: 12917 [2021-03-10 21:11:22,444 INFO L226 Difference]: Without dead ends: 12899 [2021-03-10 21:11:22,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:11:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12899 states. [2021-03-10 21:11:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12899 to 10948. [2021-03-10 21:11:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10948 states, 10947 states have (on average 2.582808075271764) internal successors, (28274), 10947 states have internal predecessors, (28274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10948 states to 10948 states and 28274 transitions. [2021-03-10 21:11:22,572 INFO L78 Accepts]: Start accepts. Automaton has 10948 states and 28274 transitions. Word has length 47 [2021-03-10 21:11:22,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:22,572 INFO L480 AbstractCegarLoop]: Abstraction has 10948 states and 28274 transitions. [2021-03-10 21:11:22,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 10948 states and 28274 transitions. [2021-03-10 21:11:22,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:22,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:22,578 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:22,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-03-10 21:11:22,783 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:22,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:22,783 INFO L82 PathProgramCache]: Analyzing trace with hash -522481797, now seen corresponding path program 120 times [2021-03-10 21:11:22,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:22,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684665295] [2021-03-10 21:11:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684665295] [2021-03-10 21:11:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731665323] [2021-03-10 21:11:22,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:22,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 21:11:22,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:22,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:22,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:22,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:22,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:11:22,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253452119] [2021-03-10 21:11:22,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:22,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:22,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:22,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:22,953 INFO L87 Difference]: Start difference. First operand 10948 states and 28274 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:23,404 INFO L93 Difference]: Finished difference Result 11576 states and 29427 transitions. [2021-03-10 21:11:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:23,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:23,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:23,416 INFO L225 Difference]: With dead ends: 11576 [2021-03-10 21:11:23,416 INFO L226 Difference]: Without dead ends: 11482 [2021-03-10 21:11:23,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-03-10 21:11:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 10887. [2021-03-10 21:11:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10887 states, 10886 states have (on average 2.5807459121807828) internal successors, (28094), 10886 states have internal predecessors, (28094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10887 states to 10887 states and 28094 transitions. [2021-03-10 21:11:23,536 INFO L78 Accepts]: Start accepts. Automaton has 10887 states and 28094 transitions. Word has length 47 [2021-03-10 21:11:23,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:23,536 INFO L480 AbstractCegarLoop]: Abstraction has 10887 states and 28094 transitions. [2021-03-10 21:11:23,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 10887 states and 28094 transitions. [2021-03-10 21:11:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:23,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:23,543 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:23,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-03-10 21:11:23,743 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:23,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:23,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1136017977, now seen corresponding path program 121 times [2021-03-10 21:11:23,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:23,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597960835] [2021-03-10 21:11:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:11:23,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597960835] [2021-03-10 21:11:23,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984628484] [2021-03-10 21:11:23,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:23,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:23,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:11:23,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:23,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:11:23,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545061738] [2021-03-10 21:11:23,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:23,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:23,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:23,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:23,897 INFO L87 Difference]: Start difference. First operand 10887 states and 28094 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:24,227 INFO L93 Difference]: Finished difference Result 11955 states and 30249 transitions. [2021-03-10 21:11:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:24,240 INFO L225 Difference]: With dead ends: 11955 [2021-03-10 21:11:24,240 INFO L226 Difference]: Without dead ends: 11901 [2021-03-10 21:11:24,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11901 states. [2021-03-10 21:11:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11901 to 10911. [2021-03-10 21:11:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10911 states, 10910 states have (on average 2.5808432630614115) internal successors, (28157), 10910 states have internal predecessors, (28157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10911 states to 10911 states and 28157 transitions. [2021-03-10 21:11:24,364 INFO L78 Accepts]: Start accepts. Automaton has 10911 states and 28157 transitions. Word has length 47 [2021-03-10 21:11:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:24,365 INFO L480 AbstractCegarLoop]: Abstraction has 10911 states and 28157 transitions. [2021-03-10 21:11:24,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 10911 states and 28157 transitions. [2021-03-10 21:11:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:24,371 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:24,371 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:24,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-03-10 21:11:24,571 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1293317464, now seen corresponding path program 69 times [2021-03-10 21:11:24,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:24,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973121013] [2021-03-10 21:11:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:24,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973121013] [2021-03-10 21:11:24,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832306027] [2021-03-10 21:11:24,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:24,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 21:11:24,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:24,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:24,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:24,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:24,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:11:24,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124326088] [2021-03-10 21:11:24,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:24,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:24,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:24,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:24,721 INFO L87 Difference]: Start difference. First operand 10911 states and 28157 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:24,895 INFO L93 Difference]: Finished difference Result 12496 states and 31409 transitions. [2021-03-10 21:11:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:11:24,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:24,907 INFO L225 Difference]: With dead ends: 12496 [2021-03-10 21:11:24,907 INFO L226 Difference]: Without dead ends: 12476 [2021-03-10 21:11:24,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:24,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12476 states. [2021-03-10 21:11:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12476 to 10514. [2021-03-10 21:11:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10514 states, 10513 states have (on average 2.5682488347759915) internal successors, (27000), 10513 states have internal predecessors, (27000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10514 states to 10514 states and 27000 transitions. [2021-03-10 21:11:25,031 INFO L78 Accepts]: Start accepts. Automaton has 10514 states and 27000 transitions. Word has length 47 [2021-03-10 21:11:25,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:25,031 INFO L480 AbstractCegarLoop]: Abstraction has 10514 states and 27000 transitions. [2021-03-10 21:11:25,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand 10514 states and 27000 transitions. [2021-03-10 21:11:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:25,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:25,037 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:25,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-03-10 21:11:25,237 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:25,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:25,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1005899357, now seen corresponding path program 122 times [2021-03-10 21:11:25,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:25,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419084684] [2021-03-10 21:11:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:25,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419084684] [2021-03-10 21:11:25,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662875180] [2021-03-10 21:11:25,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:25,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:25,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:25,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:25,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:25,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:25,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:11:25,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265756468] [2021-03-10 21:11:25,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:25,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:25,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:25,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:25,432 INFO L87 Difference]: Start difference. First operand 10514 states and 27000 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:25,916 INFO L93 Difference]: Finished difference Result 12649 states and 31460 transitions. [2021-03-10 21:11:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:11:25,917 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:25,929 INFO L225 Difference]: With dead ends: 12649 [2021-03-10 21:11:25,929 INFO L226 Difference]: Without dead ends: 12595 [2021-03-10 21:11:25,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:11:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12595 states. [2021-03-10 21:11:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 10614. [2021-03-10 21:11:26,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10614 states, 10613 states have (on average 2.5693017996796383) internal successors, (27268), 10613 states have internal predecessors, (27268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:26,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10614 states to 10614 states and 27268 transitions. [2021-03-10 21:11:26,048 INFO L78 Accepts]: Start accepts. Automaton has 10614 states and 27268 transitions. Word has length 47 [2021-03-10 21:11:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:26,049 INFO L480 AbstractCegarLoop]: Abstraction has 10614 states and 27268 transitions. [2021-03-10 21:11:26,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10614 states and 27268 transitions. [2021-03-10 21:11:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:26,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:26,055 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:26,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:26,255 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:26,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1756508830, now seen corresponding path program 123 times [2021-03-10 21:11:26,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:26,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547830755] [2021-03-10 21:11:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:26,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547830755] [2021-03-10 21:11:26,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146725066] [2021-03-10 21:11:26,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:26,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:11:26,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:26,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:26,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:26,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:26,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:11:26,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050412860] [2021-03-10 21:11:26,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:26,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:26,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:26,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:26,407 INFO L87 Difference]: Start difference. First operand 10614 states and 27268 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:26,568 INFO L93 Difference]: Finished difference Result 12531 states and 31060 transitions. [2021-03-10 21:11:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:11:26,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:26,580 INFO L225 Difference]: With dead ends: 12531 [2021-03-10 21:11:26,580 INFO L226 Difference]: Without dead ends: 12507 [2021-03-10 21:11:26,581 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12507 states. [2021-03-10 21:11:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12507 to 10614. [2021-03-10 21:11:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10614 states, 10613 states have (on average 2.5682653349665503) internal successors, (27257), 10613 states have internal predecessors, (27257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10614 states to 10614 states and 27257 transitions. [2021-03-10 21:11:26,702 INFO L78 Accepts]: Start accepts. Automaton has 10614 states and 27257 transitions. Word has length 47 [2021-03-10 21:11:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:26,703 INFO L480 AbstractCegarLoop]: Abstraction has 10614 states and 27257 transitions. [2021-03-10 21:11:26,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 10614 states and 27257 transitions. [2021-03-10 21:11:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:26,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:26,709 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:26,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-03-10 21:11:26,909 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:26,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:26,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1160735891, now seen corresponding path program 124 times [2021-03-10 21:11:26,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:26,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383618739] [2021-03-10 21:11:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:26,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383618739] [2021-03-10 21:11:26,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228466134] [2021-03-10 21:11:26,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:27,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:27,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:27,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:27,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:27,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:11:27,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880523147] [2021-03-10 21:11:27,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:11:27,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:27,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:11:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:27,071 INFO L87 Difference]: Start difference. First operand 10614 states and 27257 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:27,789 INFO L93 Difference]: Finished difference Result 15368 states and 37360 transitions. [2021-03-10 21:11:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:11:27,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:27,804 INFO L225 Difference]: With dead ends: 15368 [2021-03-10 21:11:27,804 INFO L226 Difference]: Without dead ends: 15188 [2021-03-10 21:11:27,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:11:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15188 states. [2021-03-10 21:11:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15188 to 10820. [2021-03-10 21:11:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10820 states, 10819 states have (on average 2.568906553285886) internal successors, (27793), 10819 states have internal predecessors, (27793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10820 states to 10820 states and 27793 transitions. [2021-03-10 21:11:27,943 INFO L78 Accepts]: Start accepts. Automaton has 10820 states and 27793 transitions. Word has length 47 [2021-03-10 21:11:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:27,944 INFO L480 AbstractCegarLoop]: Abstraction has 10820 states and 27793 transitions. [2021-03-10 21:11:27,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 10820 states and 27793 transitions. [2021-03-10 21:11:27,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:27,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:27,950 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:28,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:28,150 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1547338568, now seen corresponding path program 125 times [2021-03-10 21:11:28,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:28,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882557370] [2021-03-10 21:11:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:28,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882557370] [2021-03-10 21:11:28,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091817786] [2021-03-10 21:11:28,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:28,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:11:28,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:28,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:28,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:28,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:28,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-03-10 21:11:28,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530787773] [2021-03-10 21:11:28,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:11:28,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:28,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:11:28,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:28,335 INFO L87 Difference]: Start difference. First operand 10820 states and 27793 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:28,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:28,574 INFO L93 Difference]: Finished difference Result 13016 states and 32151 transitions. [2021-03-10 21:11:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:28,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:28,587 INFO L225 Difference]: With dead ends: 13016 [2021-03-10 21:11:28,587 INFO L226 Difference]: Without dead ends: 12983 [2021-03-10 21:11:28,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:11:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12983 states. [2021-03-10 21:11:28,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12983 to 10820. [2021-03-10 21:11:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10820 states, 10819 states have (on average 2.568629263333025) internal successors, (27790), 10819 states have internal predecessors, (27790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10820 states to 10820 states and 27790 transitions. [2021-03-10 21:11:28,738 INFO L78 Accepts]: Start accepts. Automaton has 10820 states and 27790 transitions. Word has length 47 [2021-03-10 21:11:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:28,738 INFO L480 AbstractCegarLoop]: Abstraction has 10820 states and 27790 transitions. [2021-03-10 21:11:28,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 10820 states and 27790 transitions. [2021-03-10 21:11:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:28,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:28,744 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:28,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:28,945 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:28,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1101044381, now seen corresponding path program 126 times [2021-03-10 21:11:28,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:28,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965611115] [2021-03-10 21:11:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:29,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965611115] [2021-03-10 21:11:29,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670135294] [2021-03-10 21:11:29,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:29,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-03-10 21:11:29,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:29,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:29,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:29,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:29,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:11:29,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226799416] [2021-03-10 21:11:29,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:29,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:29,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:29,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:29,117 INFO L87 Difference]: Start difference. First operand 10820 states and 27790 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:30,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:30,119 INFO L93 Difference]: Finished difference Result 17832 states and 42770 transitions. [2021-03-10 21:11:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 21:11:30,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:30,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:30,138 INFO L225 Difference]: With dead ends: 17832 [2021-03-10 21:11:30,138 INFO L226 Difference]: Without dead ends: 17556 [2021-03-10 21:11:30,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 21:11:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-03-10 21:11:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 11000. [2021-03-10 21:11:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11000 states, 10999 states have (on average 2.567778888989908) internal successors, (28243), 10999 states have internal predecessors, (28243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11000 states to 11000 states and 28243 transitions. [2021-03-10 21:11:30,292 INFO L78 Accepts]: Start accepts. Automaton has 11000 states and 28243 transitions. Word has length 47 [2021-03-10 21:11:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:30,292 INFO L480 AbstractCegarLoop]: Abstraction has 11000 states and 28243 transitions. [2021-03-10 21:11:30,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 11000 states and 28243 transitions. [2021-03-10 21:11:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:30,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:30,298 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:30,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:30,499 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1300350046, now seen corresponding path program 127 times [2021-03-10 21:11:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:30,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080919275] [2021-03-10 21:11:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:30,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080919275] [2021-03-10 21:11:30,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309688919] [2021-03-10 21:11:30,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:30,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:30,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:30,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:30,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:11:30,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554453966] [2021-03-10 21:11:30,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:30,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:30,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:30,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:30,666 INFO L87 Difference]: Start difference. First operand 11000 states and 28243 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:30,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:30,864 INFO L93 Difference]: Finished difference Result 13147 states and 32469 transitions. [2021-03-10 21:11:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:11:30,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:30,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:30,878 INFO L225 Difference]: With dead ends: 13147 [2021-03-10 21:11:30,878 INFO L226 Difference]: Without dead ends: 13105 [2021-03-10 21:11:30,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:11:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13105 states. [2021-03-10 21:11:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13105 to 10785. [2021-03-10 21:11:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10785 states, 10784 states have (on average 2.561758160237389) internal successors, (27626), 10784 states have internal predecessors, (27626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 27626 transitions. [2021-03-10 21:11:31,009 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 27626 transitions. Word has length 47 [2021-03-10 21:11:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:31,009 INFO L480 AbstractCegarLoop]: Abstraction has 10785 states and 27626 transitions. [2021-03-10 21:11:31,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 27626 transitions. [2021-03-10 21:11:31,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:31,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:31,015 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:31,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-03-10 21:11:31,216 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:31,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:31,216 INFO L82 PathProgramCache]: Analyzing trace with hash 947730515, now seen corresponding path program 128 times [2021-03-10 21:11:31,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:31,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398261747] [2021-03-10 21:11:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:31,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398261747] [2021-03-10 21:11:31,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771990827] [2021-03-10 21:11:31,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:31,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:31,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:31,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:31,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:31,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:31,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:11:31,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695790829] [2021-03-10 21:11:31,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:11:31,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:31,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:11:31,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:31,397 INFO L87 Difference]: Start difference. First operand 10785 states and 27626 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:31,926 INFO L93 Difference]: Finished difference Result 14592 states and 35347 transitions. [2021-03-10 21:11:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:11:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:31,941 INFO L225 Difference]: With dead ends: 14592 [2021-03-10 21:11:31,941 INFO L226 Difference]: Without dead ends: 14214 [2021-03-10 21:11:31,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:11:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14214 states. [2021-03-10 21:11:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14214 to 10145. [2021-03-10 21:11:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10145 states, 10144 states have (on average 2.5617113564668768) internal successors, (25986), 10144 states have internal predecessors, (25986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10145 states to 10145 states and 25986 transitions. [2021-03-10 21:11:32,086 INFO L78 Accepts]: Start accepts. Automaton has 10145 states and 25986 transitions. Word has length 47 [2021-03-10 21:11:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:32,086 INFO L480 AbstractCegarLoop]: Abstraction has 10145 states and 25986 transitions. [2021-03-10 21:11:32,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 10145 states and 25986 transitions. [2021-03-10 21:11:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:32,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:32,092 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:32,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-03-10 21:11:32,293 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash 87788588, now seen corresponding path program 70 times [2021-03-10 21:11:32,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:32,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085745053] [2021-03-10 21:11:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:32,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085745053] [2021-03-10 21:11:32,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159100081] [2021-03-10 21:11:32,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:32,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:32,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:32,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:11:32,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272761003] [2021-03-10 21:11:32,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:32,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:32,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:32,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:32,441 INFO L87 Difference]: Start difference. First operand 10145 states and 25986 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:32,654 INFO L93 Difference]: Finished difference Result 13552 states and 33367 transitions. [2021-03-10 21:11:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:32,654 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:32,668 INFO L225 Difference]: With dead ends: 13552 [2021-03-10 21:11:32,668 INFO L226 Difference]: Without dead ends: 13552 [2021-03-10 21:11:32,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:11:32,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13552 states. [2021-03-10 21:11:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13552 to 10331. [2021-03-10 21:11:32,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10331 states, 10330 states have (on average 2.5701839303000966) internal successors, (26550), 10330 states have internal predecessors, (26550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10331 states to 10331 states and 26550 transitions. [2021-03-10 21:11:32,797 INFO L78 Accepts]: Start accepts. Automaton has 10331 states and 26550 transitions. Word has length 47 [2021-03-10 21:11:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:32,798 INFO L480 AbstractCegarLoop]: Abstraction has 10331 states and 26550 transitions. [2021-03-10 21:11:32,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 10331 states and 26550 transitions. [2021-03-10 21:11:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:32,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:32,804 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:33,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-03-10 21:11:33,004 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:33,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1549783868, now seen corresponding path program 71 times [2021-03-10 21:11:33,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:33,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479625819] [2021-03-10 21:11:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:33,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479625819] [2021-03-10 21:11:33,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942211527] [2021-03-10 21:11:33,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:33,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-03-10 21:11:33,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:33,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:33,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:33,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-03-10 21:11:33,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015147700] [2021-03-10 21:11:33,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:11:33,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:33,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:11:33,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:11:33,270 INFO L87 Difference]: Start difference. First operand 10331 states and 26550 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:34,079 INFO L93 Difference]: Finished difference Result 15153 states and 36953 transitions. [2021-03-10 21:11:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:11:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:34,095 INFO L225 Difference]: With dead ends: 15153 [2021-03-10 21:11:34,095 INFO L226 Difference]: Without dead ends: 15153 [2021-03-10 21:11:34,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 437.1ms TimeCoverageRelationStatistics Valid=644, Invalid=1336, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:11:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15153 states. [2021-03-10 21:11:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15153 to 10347. [2021-03-10 21:11:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10347 states, 10346 states have (on average 2.570751981442103) internal successors, (26597), 10346 states have internal predecessors, (26597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10347 states to 10347 states and 26597 transitions. [2021-03-10 21:11:34,231 INFO L78 Accepts]: Start accepts. Automaton has 10347 states and 26597 transitions. Word has length 47 [2021-03-10 21:11:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:34,231 INFO L480 AbstractCegarLoop]: Abstraction has 10347 states and 26597 transitions. [2021-03-10 21:11:34,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 10347 states and 26597 transitions. [2021-03-10 21:11:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:34,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:34,237 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:34,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-03-10 21:11:34,437 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1055188264, now seen corresponding path program 72 times [2021-03-10 21:11:34,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:34,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973916011] [2021-03-10 21:11:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973916011] [2021-03-10 21:11:34,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405255404] [2021-03-10 21:11:34,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:34,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-03-10 21:11:34,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:34,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:34,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:34,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:34,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:11:34,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468884165] [2021-03-10 21:11:34,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:34,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:34,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:34,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:34,610 INFO L87 Difference]: Start difference. First operand 10347 states and 26597 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:34,933 INFO L93 Difference]: Finished difference Result 14271 states and 35050 transitions. [2021-03-10 21:11:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:11:34,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:34,947 INFO L225 Difference]: With dead ends: 14271 [2021-03-10 21:11:34,947 INFO L226 Difference]: Without dead ends: 14271 [2021-03-10 21:11:34,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:11:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14271 states. [2021-03-10 21:11:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14271 to 10370. [2021-03-10 21:11:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10370 states, 10369 states have (on average 2.5716076767287106) internal successors, (26665), 10369 states have internal predecessors, (26665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10370 states to 10370 states and 26665 transitions. [2021-03-10 21:11:35,126 INFO L78 Accepts]: Start accepts. Automaton has 10370 states and 26665 transitions. Word has length 47 [2021-03-10 21:11:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:35,126 INFO L480 AbstractCegarLoop]: Abstraction has 10370 states and 26665 transitions. [2021-03-10 21:11:35,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:35,126 INFO L276 IsEmpty]: Start isEmpty. Operand 10370 states and 26665 transitions. [2021-03-10 21:11:35,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:35,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:35,132 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:35,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-03-10 21:11:35,334 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:35,334 INFO L82 PathProgramCache]: Analyzing trace with hash 15901252, now seen corresponding path program 73 times [2021-03-10 21:11:35,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:35,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083734943] [2021-03-10 21:11:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:35,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083734943] [2021-03-10 21:11:35,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834321518] [2021-03-10 21:11:35,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:35,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:35,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:11:35,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26128867] [2021-03-10 21:11:35,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:11:35,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:11:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:35,520 INFO L87 Difference]: Start difference. First operand 10370 states and 26665 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:35,858 INFO L93 Difference]: Finished difference Result 13394 states and 33045 transitions. [2021-03-10 21:11:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:11:35,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:35,872 INFO L225 Difference]: With dead ends: 13394 [2021-03-10 21:11:35,872 INFO L226 Difference]: Without dead ends: 13394 [2021-03-10 21:11:35,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=227, Invalid=373, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:11:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13394 states. [2021-03-10 21:11:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13394 to 10396. [2021-03-10 21:11:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10396 states, 10395 states have (on average 2.5725829725829725) internal successors, (26742), 10395 states have internal predecessors, (26742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10396 states to 10396 states and 26742 transitions. [2021-03-10 21:11:36,005 INFO L78 Accepts]: Start accepts. Automaton has 10396 states and 26742 transitions. Word has length 47 [2021-03-10 21:11:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:36,005 INFO L480 AbstractCegarLoop]: Abstraction has 10396 states and 26742 transitions. [2021-03-10 21:11:36,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 10396 states and 26742 transitions. [2021-03-10 21:11:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:36,011 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:36,011 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:36,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:36,211 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1035763624, now seen corresponding path program 74 times [2021-03-10 21:11:36,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:36,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415475589] [2021-03-10 21:11:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:36,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415475589] [2021-03-10 21:11:36,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388340588] [2021-03-10 21:11:36,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:36,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:36,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:36,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:36,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-03-10 21:11:36,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022138026] [2021-03-10 21:11:36,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:11:36,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:36,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:11:36,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:36,400 INFO L87 Difference]: Start difference. First operand 10396 states and 26742 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:36,725 INFO L93 Difference]: Finished difference Result 12224 states and 30379 transitions. [2021-03-10 21:11:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:36,725 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:36,736 INFO L225 Difference]: With dead ends: 12224 [2021-03-10 21:11:36,737 INFO L226 Difference]: Without dead ends: 12224 [2021-03-10 21:11:36,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:11:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12224 states. [2021-03-10 21:11:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12224 to 9933. [2021-03-10 21:11:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9933 states, 9932 states have (on average 2.5726943213854208) internal successors, (25552), 9932 states have internal predecessors, (25552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9933 states to 9933 states and 25552 transitions. [2021-03-10 21:11:36,852 INFO L78 Accepts]: Start accepts. Automaton has 9933 states and 25552 transitions. Word has length 47 [2021-03-10 21:11:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:36,852 INFO L480 AbstractCegarLoop]: Abstraction has 9933 states and 25552 transitions. [2021-03-10 21:11:36,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 9933 states and 25552 transitions. [2021-03-10 21:11:36,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:36,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:36,858 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:37,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-03-10 21:11:37,058 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:37,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1697148168, now seen corresponding path program 129 times [2021-03-10 21:11:37,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:37,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598526289] [2021-03-10 21:11:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:37,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598526289] [2021-03-10 21:11:37,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207021541] [2021-03-10 21:11:37,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:37,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:11:37,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:37,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:37,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:37,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:37,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:11:37,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406596033] [2021-03-10 21:11:37,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:11:37,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:37,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:11:37,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:37,243 INFO L87 Difference]: Start difference. First operand 9933 states and 25552 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:37,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:37,460 INFO L93 Difference]: Finished difference Result 11582 states and 28847 transitions. [2021-03-10 21:11:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:11:37,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:37,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:37,472 INFO L225 Difference]: With dead ends: 11582 [2021-03-10 21:11:37,472 INFO L226 Difference]: Without dead ends: 11537 [2021-03-10 21:11:37,473 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:11:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-03-10 21:11:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 9942. [2021-03-10 21:11:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9942 states, 9941 states have (on average 2.571874056935922) internal successors, (25567), 9941 states have internal predecessors, (25567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9942 states to 9942 states and 25567 transitions. [2021-03-10 21:11:37,588 INFO L78 Accepts]: Start accepts. Automaton has 9942 states and 25567 transitions. Word has length 47 [2021-03-10 21:11:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:37,588 INFO L480 AbstractCegarLoop]: Abstraction has 9942 states and 25567 transitions. [2021-03-10 21:11:37,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 9942 states and 25567 transitions. [2021-03-10 21:11:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:37,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:37,594 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:37,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:37,794 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:37,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1349917610, now seen corresponding path program 130 times [2021-03-10 21:11:37,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:37,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96526659] [2021-03-10 21:11:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:37,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96526659] [2021-03-10 21:11:37,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991597724] [2021-03-10 21:11:37,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:37,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:37,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:37,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:37,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:37,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:37,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:11:37,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320455157] [2021-03-10 21:11:37,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:11:37,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:37,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:11:37,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:37,981 INFO L87 Difference]: Start difference. First operand 9942 states and 25567 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:38,330 INFO L93 Difference]: Finished difference Result 12326 states and 30897 transitions. [2021-03-10 21:11:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:11:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:38,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:38,342 INFO L225 Difference]: With dead ends: 12326 [2021-03-10 21:11:38,342 INFO L226 Difference]: Without dead ends: 12326 [2021-03-10 21:11:38,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:11:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12326 states. [2021-03-10 21:11:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12326 to 10210. [2021-03-10 21:11:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10209 states have (on average 2.59104711529043) internal successors, (26452), 10209 states have internal predecessors, (26452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 26452 transitions. [2021-03-10 21:11:38,480 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 26452 transitions. Word has length 47 [2021-03-10 21:11:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:38,480 INFO L480 AbstractCegarLoop]: Abstraction has 10210 states and 26452 transitions. [2021-03-10 21:11:38,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 26452 transitions. [2021-03-10 21:11:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:38,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:38,486 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:38,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-03-10 21:11:38,691 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:38,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1627893973, now seen corresponding path program 75 times [2021-03-10 21:11:38,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:38,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239974990] [2021-03-10 21:11:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:38,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239974990] [2021-03-10 21:11:38,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694118708] [2021-03-10 21:11:38,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:38,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:11:38,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:38,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:38,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:38,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:38,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:11:38,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437799237] [2021-03-10 21:11:38,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:11:38,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:38,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:11:38,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:38,873 INFO L87 Difference]: Start difference. First operand 10210 states and 26452 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:39,328 INFO L93 Difference]: Finished difference Result 15408 states and 38231 transitions. [2021-03-10 21:11:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:11:39,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:39,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:39,344 INFO L225 Difference]: With dead ends: 15408 [2021-03-10 21:11:39,344 INFO L226 Difference]: Without dead ends: 15276 [2021-03-10 21:11:39,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:11:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15276 states. [2021-03-10 21:11:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15276 to 10533. [2021-03-10 21:11:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10533 states, 10532 states have (on average 2.591340676034941) internal successors, (27292), 10532 states have internal predecessors, (27292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:39,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10533 states to 10533 states and 27292 transitions. [2021-03-10 21:11:39,476 INFO L78 Accepts]: Start accepts. Automaton has 10533 states and 27292 transitions. Word has length 47 [2021-03-10 21:11:39,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:39,476 INFO L480 AbstractCegarLoop]: Abstraction has 10533 states and 27292 transitions. [2021-03-10 21:11:39,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 10533 states and 27292 transitions. [2021-03-10 21:11:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:39,482 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:39,482 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:39,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-03-10 21:11:39,683 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:39,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:39,683 INFO L82 PathProgramCache]: Analyzing trace with hash -990822175, now seen corresponding path program 131 times [2021-03-10 21:11:39,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:39,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860366707] [2021-03-10 21:11:39,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:39,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860366707] [2021-03-10 21:11:39,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817736592] [2021-03-10 21:11:39,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:39,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:11:39,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:39,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:39,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:39,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:39,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:11:39,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084609789] [2021-03-10 21:11:39,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:11:39,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:39,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:11:39,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:11:39,946 INFO L87 Difference]: Start difference. First operand 10533 states and 27292 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:40,428 INFO L93 Difference]: Finished difference Result 10939 states and 28017 transitions. [2021-03-10 21:11:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:11:40,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:40,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:40,441 INFO L225 Difference]: With dead ends: 10939 [2021-03-10 21:11:40,441 INFO L226 Difference]: Without dead ends: 10815 [2021-03-10 21:11:40,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:11:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10815 states. [2021-03-10 21:11:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10815 to 10569. [2021-03-10 21:11:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10569 states, 10568 states have (on average 2.5857305071915215) internal successors, (27326), 10568 states have internal predecessors, (27326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 27326 transitions. [2021-03-10 21:11:40,555 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 27326 transitions. Word has length 47 [2021-03-10 21:11:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:40,555 INFO L480 AbstractCegarLoop]: Abstraction has 10569 states and 27326 transitions. [2021-03-10 21:11:40,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 27326 transitions. [2021-03-10 21:11:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:40,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:40,561 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:40,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-03-10 21:11:40,764 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:40,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:40,764 INFO L82 PathProgramCache]: Analyzing trace with hash -759601188, now seen corresponding path program 76 times [2021-03-10 21:11:40,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:40,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306528055] [2021-03-10 21:11:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:40,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306528055] [2021-03-10 21:11:40,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373721940] [2021-03-10 21:11:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:40,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:40,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:40,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:40,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:40,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:40,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:11:40,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062496716] [2021-03-10 21:11:40,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:11:40,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:40,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:11:40,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:40,953 INFO L87 Difference]: Start difference. First operand 10569 states and 27326 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:41,182 INFO L93 Difference]: Finished difference Result 12470 states and 31124 transitions. [2021-03-10 21:11:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:11:41,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:41,195 INFO L225 Difference]: With dead ends: 12470 [2021-03-10 21:11:41,195 INFO L226 Difference]: Without dead ends: 12368 [2021-03-10 21:11:41,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:11:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12368 states. [2021-03-10 21:11:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12368 to 10417. [2021-03-10 21:11:41,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10417 states, 10416 states have (on average 2.5853494623655915) internal successors, (26929), 10416 states have internal predecessors, (26929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10417 states to 10417 states and 26929 transitions. [2021-03-10 21:11:41,320 INFO L78 Accepts]: Start accepts. Automaton has 10417 states and 26929 transitions. Word has length 47 [2021-03-10 21:11:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:41,321 INFO L480 AbstractCegarLoop]: Abstraction has 10417 states and 26929 transitions. [2021-03-10 21:11:41,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:41,321 INFO L276 IsEmpty]: Start isEmpty. Operand 10417 states and 26929 transitions. [2021-03-10 21:11:41,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:41,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:41,326 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:41,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-03-10 21:11:41,527 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:41,527 INFO L82 PathProgramCache]: Analyzing trace with hash 975177942, now seen corresponding path program 132 times [2021-03-10 21:11:41,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:41,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353579952] [2021-03-10 21:11:41,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:41,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353579952] [2021-03-10 21:11:41,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228788348] [2021-03-10 21:11:41,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:41,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 21:11:41,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:41,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:41,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:41,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:41,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:11:41,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099607299] [2021-03-10 21:11:41,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:41,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:41,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:41,703 INFO L87 Difference]: Start difference. First operand 10417 states and 26929 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:41,980 INFO L93 Difference]: Finished difference Result 12839 states and 32379 transitions. [2021-03-10 21:11:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:11:41,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:41,993 INFO L225 Difference]: With dead ends: 12839 [2021-03-10 21:11:41,993 INFO L226 Difference]: Without dead ends: 12839 [2021-03-10 21:11:41,993 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:11:42,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12839 states. [2021-03-10 21:11:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12839 to 10661. [2021-03-10 21:11:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10661 states, 10660 states have (on average 2.598686679174484) internal successors, (27702), 10660 states have internal predecessors, (27702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10661 states to 10661 states and 27702 transitions. [2021-03-10 21:11:42,122 INFO L78 Accepts]: Start accepts. Automaton has 10661 states and 27702 transitions. Word has length 47 [2021-03-10 21:11:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:42,122 INFO L480 AbstractCegarLoop]: Abstraction has 10661 states and 27702 transitions. [2021-03-10 21:11:42,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 10661 states and 27702 transitions. [2021-03-10 21:11:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:42,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:42,128 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:42,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-03-10 21:11:42,328 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:42,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1064796407, now seen corresponding path program 77 times [2021-03-10 21:11:42,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:42,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552138997] [2021-03-10 21:11:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:42,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552138997] [2021-03-10 21:11:42,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350567324] [2021-03-10 21:11:42,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:42,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:11:42,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:42,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:42,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:42,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:11:42,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332382572] [2021-03-10 21:11:42,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:42,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:42,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:42,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:42,501 INFO L87 Difference]: Start difference. First operand 10661 states and 27702 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:42,921 INFO L93 Difference]: Finished difference Result 14169 states and 35663 transitions. [2021-03-10 21:11:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:11:42,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:42,935 INFO L225 Difference]: With dead ends: 14169 [2021-03-10 21:11:42,935 INFO L226 Difference]: Without dead ends: 14155 [2021-03-10 21:11:42,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:11:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14155 states. [2021-03-10 21:11:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14155 to 10632. [2021-03-10 21:11:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10632 states, 10631 states have (on average 2.6041764650550276) internal successors, (27685), 10631 states have internal predecessors, (27685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10632 states to 10632 states and 27685 transitions. [2021-03-10 21:11:43,063 INFO L78 Accepts]: Start accepts. Automaton has 10632 states and 27685 transitions. Word has length 47 [2021-03-10 21:11:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:43,063 INFO L480 AbstractCegarLoop]: Abstraction has 10632 states and 27685 transitions. [2021-03-10 21:11:43,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10632 states and 27685 transitions. [2021-03-10 21:11:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:43,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:43,069 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:43,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-03-10 21:11:43,269 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash 239202347, now seen corresponding path program 133 times [2021-03-10 21:11:43,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:43,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728192367] [2021-03-10 21:11:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728192367] [2021-03-10 21:11:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249197327] [2021-03-10 21:11:43,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:43,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:43,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:43,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:43,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:11:43,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793385520] [2021-03-10 21:11:43,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:11:43,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:43,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:11:43,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:43,495 INFO L87 Difference]: Start difference. First operand 10632 states and 27685 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:43,914 INFO L93 Difference]: Finished difference Result 10972 states and 28281 transitions. [2021-03-10 21:11:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:11:43,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:43,925 INFO L225 Difference]: With dead ends: 10972 [2021-03-10 21:11:43,925 INFO L226 Difference]: Without dead ends: 10884 [2021-03-10 21:11:43,925 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:11:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10884 states. [2021-03-10 21:11:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10884 to 10614. [2021-03-10 21:11:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10614 states, 10613 states have (on average 2.6034109111467068) internal successors, (27630), 10613 states have internal predecessors, (27630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10614 states to 10614 states and 27630 transitions. [2021-03-10 21:11:44,037 INFO L78 Accepts]: Start accepts. Automaton has 10614 states and 27630 transitions. Word has length 47 [2021-03-10 21:11:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:44,037 INFO L480 AbstractCegarLoop]: Abstraction has 10614 states and 27630 transitions. [2021-03-10 21:11:44,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 10614 states and 27630 transitions. [2021-03-10 21:11:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:44,043 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:44,043 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:44,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-03-10 21:11:44,243 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:44,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:44,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1077953366, now seen corresponding path program 78 times [2021-03-10 21:11:44,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:44,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438428094] [2021-03-10 21:11:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:44,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438428094] [2021-03-10 21:11:44,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162068268] [2021-03-10 21:11:44,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:44,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:11:44,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:44,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:44,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:44,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:44,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-03-10 21:11:44,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888045694] [2021-03-10 21:11:44,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:11:44,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:44,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:11:44,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:11:44,432 INFO L87 Difference]: Start difference. First operand 10614 states and 27630 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:44,678 INFO L93 Difference]: Finished difference Result 12144 states and 30667 transitions. [2021-03-10 21:11:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:44,691 INFO L225 Difference]: With dead ends: 12144 [2021-03-10 21:11:44,691 INFO L226 Difference]: Without dead ends: 12090 [2021-03-10 21:11:44,691 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:11:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12090 states. [2021-03-10 21:11:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12090 to 10420. [2021-03-10 21:11:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10420 states, 10419 states have (on average 2.602840963624148) internal successors, (27119), 10419 states have internal predecessors, (27119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10420 states to 10420 states and 27119 transitions. [2021-03-10 21:11:44,814 INFO L78 Accepts]: Start accepts. Automaton has 10420 states and 27119 transitions. Word has length 47 [2021-03-10 21:11:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:44,814 INFO L480 AbstractCegarLoop]: Abstraction has 10420 states and 27119 transitions. [2021-03-10 21:11:44,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:44,814 INFO L276 IsEmpty]: Start isEmpty. Operand 10420 states and 27119 transitions. [2021-03-10 21:11:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:44,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:44,819 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:45,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable499,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:45,019 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:45,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1223920619, now seen corresponding path program 79 times [2021-03-10 21:11:45,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:45,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488457501] [2021-03-10 21:11:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:45,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488457501] [2021-03-10 21:11:45,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689850484] [2021-03-10 21:11:45,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:45,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:45,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:45,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:11:45,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924652945] [2021-03-10 21:11:45,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:11:45,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:45,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:11:45,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:45,230 INFO L87 Difference]: Start difference. First operand 10420 states and 27119 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:45,608 INFO L93 Difference]: Finished difference Result 12479 states and 31704 transitions. [2021-03-10 21:11:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:11:45,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:45,620 INFO L225 Difference]: With dead ends: 12479 [2021-03-10 21:11:45,620 INFO L226 Difference]: Without dead ends: 12465 [2021-03-10 21:11:45,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:11:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12465 states. [2021-03-10 21:11:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12465 to 10442. [2021-03-10 21:11:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10442 states, 10441 states have (on average 2.6033904798390957) internal successors, (27182), 10441 states have internal predecessors, (27182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10442 states to 10442 states and 27182 transitions. [2021-03-10 21:11:45,737 INFO L78 Accepts]: Start accepts. Automaton has 10442 states and 27182 transitions. Word has length 47 [2021-03-10 21:11:45,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:45,737 INFO L480 AbstractCegarLoop]: Abstraction has 10442 states and 27182 transitions. [2021-03-10 21:11:45,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 10442 states and 27182 transitions. [2021-03-10 21:11:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:45,742 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:45,742 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:45,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:45,943 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:45,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1400811563, now seen corresponding path program 134 times [2021-03-10 21:11:45,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:45,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206557772] [2021-03-10 21:11:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:46,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206557772] [2021-03-10 21:11:46,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035648964] [2021-03-10 21:11:46,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:46,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:46,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:46,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:46,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:46,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:46,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 21:11:46,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117585771] [2021-03-10 21:11:46,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:11:46,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:46,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:11:46,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:46,191 INFO L87 Difference]: Start difference. First operand 10442 states and 27182 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:46,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:46,525 INFO L93 Difference]: Finished difference Result 10497 states and 27271 transitions. [2021-03-10 21:11:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:11:46,526 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:46,535 INFO L225 Difference]: With dead ends: 10497 [2021-03-10 21:11:46,535 INFO L226 Difference]: Without dead ends: 10459 [2021-03-10 21:11:46,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10459 states. [2021-03-10 21:11:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10459 to 10433. [2021-03-10 21:11:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10433 states, 10432 states have (on average 2.6030483128834354) internal successors, (27155), 10432 states have internal predecessors, (27155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10433 states to 10433 states and 27155 transitions. [2021-03-10 21:11:46,642 INFO L78 Accepts]: Start accepts. Automaton has 10433 states and 27155 transitions. Word has length 47 [2021-03-10 21:11:46,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:46,642 INFO L480 AbstractCegarLoop]: Abstraction has 10433 states and 27155 transitions. [2021-03-10 21:11:46,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 10433 states and 27155 transitions. [2021-03-10 21:11:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:46,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:46,647 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:46,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:46,847 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:46,848 INFO L82 PathProgramCache]: Analyzing trace with hash 118327946, now seen corresponding path program 135 times [2021-03-10 21:11:46,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:46,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524980213] [2021-03-10 21:11:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:46,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524980213] [2021-03-10 21:11:46,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78667252] [2021-03-10 21:11:46,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:46,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:11:46,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:46,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:46,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:47,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:47,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:11:47,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094186778] [2021-03-10 21:11:47,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:47,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:47,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:47,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:47,010 INFO L87 Difference]: Start difference. First operand 10433 states and 27155 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:47,190 INFO L93 Difference]: Finished difference Result 13321 states and 33775 transitions. [2021-03-10 21:11:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:11:47,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:47,204 INFO L225 Difference]: With dead ends: 13321 [2021-03-10 21:11:47,204 INFO L226 Difference]: Without dead ends: 13321 [2021-03-10 21:11:47,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13321 states. [2021-03-10 21:11:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13321 to 11000. [2021-03-10 21:11:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11000 states, 10999 states have (on average 2.6252386580598235) internal successors, (28875), 10999 states have internal predecessors, (28875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11000 states to 11000 states and 28875 transitions. [2021-03-10 21:11:47,342 INFO L78 Accepts]: Start accepts. Automaton has 11000 states and 28875 transitions. Word has length 47 [2021-03-10 21:11:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:47,342 INFO L480 AbstractCegarLoop]: Abstraction has 11000 states and 28875 transitions. [2021-03-10 21:11:47,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 11000 states and 28875 transitions. [2021-03-10 21:11:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:47,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:47,348 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:47,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-03-10 21:11:47,550 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:47,550 INFO L82 PathProgramCache]: Analyzing trace with hash -652507721, now seen corresponding path program 80 times [2021-03-10 21:11:47,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:47,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806692524] [2021-03-10 21:11:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:47,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806692524] [2021-03-10 21:11:47,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999761633] [2021-03-10 21:11:47,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:47,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:47,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:47,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:47,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:47,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:47,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:11:47,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031146736] [2021-03-10 21:11:47,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:47,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:47,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:47,710 INFO L87 Difference]: Start difference. First operand 11000 states and 28875 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:48,086 INFO L93 Difference]: Finished difference Result 12016 states and 31032 transitions. [2021-03-10 21:11:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:11:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:48,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:48,098 INFO L225 Difference]: With dead ends: 12016 [2021-03-10 21:11:48,098 INFO L226 Difference]: Without dead ends: 12016 [2021-03-10 21:11:48,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:11:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12016 states. [2021-03-10 21:11:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12016 to 11016. [2021-03-10 21:11:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11016 states, 11015 states have (on average 2.6254198819791195) internal successors, (28919), 11015 states have internal predecessors, (28919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 28919 transitions. [2021-03-10 21:11:48,268 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 28919 transitions. Word has length 47 [2021-03-10 21:11:48,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:48,268 INFO L480 AbstractCegarLoop]: Abstraction has 11016 states and 28919 transitions. [2021-03-10 21:11:48,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:48,268 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 28919 transitions. [2021-03-10 21:11:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:48,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:48,273 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:48,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:48,475 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:48,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2009163191, now seen corresponding path program 136 times [2021-03-10 21:11:48,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:48,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454679980] [2021-03-10 21:11:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:48,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454679980] [2021-03-10 21:11:48,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518110644] [2021-03-10 21:11:48,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:48,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:48,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:48,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:48,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:48,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 21:11:48,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655618699] [2021-03-10 21:11:48,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:11:48,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:48,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:11:48,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:48,667 INFO L87 Difference]: Start difference. First operand 11016 states and 28919 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:48,958 INFO L93 Difference]: Finished difference Result 11087 states and 29024 transitions. [2021-03-10 21:11:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:11:48,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:48,969 INFO L225 Difference]: With dead ends: 11087 [2021-03-10 21:11:48,969 INFO L226 Difference]: Without dead ends: 11064 [2021-03-10 21:11:48,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11064 states. [2021-03-10 21:11:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11064 to 11007. [2021-03-10 21:11:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11007 states, 11006 states have (on average 2.625477012538615) internal successors, (28896), 11006 states have internal predecessors, (28896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11007 states to 11007 states and 28896 transitions. [2021-03-10 21:11:49,082 INFO L78 Accepts]: Start accepts. Automaton has 11007 states and 28896 transitions. Word has length 47 [2021-03-10 21:11:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:49,082 INFO L480 AbstractCegarLoop]: Abstraction has 11007 states and 28896 transitions. [2021-03-10 21:11:49,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 11007 states and 28896 transitions. [2021-03-10 21:11:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:49,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:49,088 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:49,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:49,288 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:49,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:49,288 INFO L82 PathProgramCache]: Analyzing trace with hash -732216406, now seen corresponding path program 81 times [2021-03-10 21:11:49,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:49,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884397329] [2021-03-10 21:11:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:49,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884397329] [2021-03-10 21:11:49,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291485402] [2021-03-10 21:11:49,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:49,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:11:49,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:49,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:49,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:11:49,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798655883] [2021-03-10 21:11:49,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:11:49,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:49,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:11:49,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:49,449 INFO L87 Difference]: Start difference. First operand 11007 states and 28896 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:49,668 INFO L93 Difference]: Finished difference Result 12029 states and 30900 transitions. [2021-03-10 21:11:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:11:49,668 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:49,680 INFO L225 Difference]: With dead ends: 12029 [2021-03-10 21:11:49,680 INFO L226 Difference]: Without dead ends: 12013 [2021-03-10 21:11:49,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12013 states. [2021-03-10 21:11:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12013 to 11007. [2021-03-10 21:11:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11007 states, 11006 states have (on average 2.624750136289297) internal successors, (28888), 11006 states have internal predecessors, (28888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11007 states to 11007 states and 28888 transitions. [2021-03-10 21:11:49,799 INFO L78 Accepts]: Start accepts. Automaton has 11007 states and 28888 transitions. Word has length 47 [2021-03-10 21:11:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:49,799 INFO L480 AbstractCegarLoop]: Abstraction has 11007 states and 28888 transitions. [2021-03-10 21:11:49,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 11007 states and 28888 transitions. [2021-03-10 21:11:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:49,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:49,805 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:50,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-03-10 21:11:50,005 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:50,006 INFO L82 PathProgramCache]: Analyzing trace with hash 568667938, now seen corresponding path program 137 times [2021-03-10 21:11:50,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:50,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685135201] [2021-03-10 21:11:50,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:50,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685135201] [2021-03-10 21:11:50,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487627412] [2021-03-10 21:11:50,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:50,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:11:50,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:50,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:50,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:50,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 12 [2021-03-10 21:11:50,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899936638] [2021-03-10 21:11:50,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:50,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:50,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:50,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:50,170 INFO L87 Difference]: Start difference. First operand 11007 states and 28888 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:50,348 INFO L93 Difference]: Finished difference Result 14362 states and 36240 transitions. [2021-03-10 21:11:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:11:50,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:50,364 INFO L225 Difference]: With dead ends: 14362 [2021-03-10 21:11:50,364 INFO L226 Difference]: Without dead ends: 14362 [2021-03-10 21:11:50,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14362 states. [2021-03-10 21:11:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14362 to 11460. [2021-03-10 21:11:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11460 states, 11459 states have (on average 2.638450126538092) internal successors, (30234), 11459 states have internal predecessors, (30234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11460 states to 11460 states and 30234 transitions. [2021-03-10 21:11:50,509 INFO L78 Accepts]: Start accepts. Automaton has 11460 states and 30234 transitions. Word has length 47 [2021-03-10 21:11:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:50,509 INFO L480 AbstractCegarLoop]: Abstraction has 11460 states and 30234 transitions. [2021-03-10 21:11:50,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 11460 states and 30234 transitions. [2021-03-10 21:11:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:50,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:50,516 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:50,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-03-10 21:11:50,719 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:50,719 INFO L82 PathProgramCache]: Analyzing trace with hash 330606421, now seen corresponding path program 82 times [2021-03-10 21:11:50,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:50,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586614008] [2021-03-10 21:11:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:50,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586614008] [2021-03-10 21:11:50,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380161807] [2021-03-10 21:11:50,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:50,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:50,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:50,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:50,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:50,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:50,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:11:50,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050247774] [2021-03-10 21:11:50,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:50,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:50,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:50,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:50,878 INFO L87 Difference]: Start difference. First operand 11460 states and 30234 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:51,249 INFO L93 Difference]: Finished difference Result 13228 states and 33975 transitions. [2021-03-10 21:11:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:51,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:51,263 INFO L225 Difference]: With dead ends: 13228 [2021-03-10 21:11:51,263 INFO L226 Difference]: Without dead ends: 13185 [2021-03-10 21:11:51,264 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13185 states. [2021-03-10 21:11:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13185 to 12058. [2021-03-10 21:11:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12058 states, 12057 states have (on average 2.6192253462718753) internal successors, (31580), 12057 states have internal predecessors, (31580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12058 states to 12058 states and 31580 transitions. [2021-03-10 21:11:51,430 INFO L78 Accepts]: Start accepts. Automaton has 12058 states and 31580 transitions. Word has length 47 [2021-03-10 21:11:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:51,430 INFO L480 AbstractCegarLoop]: Abstraction has 12058 states and 31580 transitions. [2021-03-10 21:11:51,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 12058 states and 31580 transitions. [2021-03-10 21:11:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:51,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:51,436 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:51,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:51,636 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1223090436, now seen corresponding path program 138 times [2021-03-10 21:11:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:51,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056660858] [2021-03-10 21:11:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:51,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056660858] [2021-03-10 21:11:51,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277356304] [2021-03-10 21:11:51,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:51,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:11:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:51,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:51,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:11:51,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797071176] [2021-03-10 21:11:51,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:51,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:51,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:51,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:51,777 INFO L87 Difference]: Start difference. First operand 12058 states and 31580 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:51,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:51,911 INFO L93 Difference]: Finished difference Result 14393 states and 36304 transitions. [2021-03-10 21:11:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:11:51,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:51,926 INFO L225 Difference]: With dead ends: 14393 [2021-03-10 21:11:51,926 INFO L226 Difference]: Without dead ends: 14390 [2021-03-10 21:11:51,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14390 states. [2021-03-10 21:11:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14390 to 12057. [2021-03-10 21:11:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12057 states, 12056 states have (on average 2.6188619774386197) internal successors, (31573), 12056 states have internal predecessors, (31573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12057 states to 12057 states and 31573 transitions. [2021-03-10 21:11:52,076 INFO L78 Accepts]: Start accepts. Automaton has 12057 states and 31573 transitions. Word has length 47 [2021-03-10 21:11:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:52,076 INFO L480 AbstractCegarLoop]: Abstraction has 12057 states and 31573 transitions. [2021-03-10 21:11:52,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 12057 states and 31573 transitions. [2021-03-10 21:11:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:52,082 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:52,082 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:52,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:52,282 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:52,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1016027870, now seen corresponding path program 139 times [2021-03-10 21:11:52,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:52,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729550316] [2021-03-10 21:11:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:52,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729550316] [2021-03-10 21:11:52,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929017906] [2021-03-10 21:11:52,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:52,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:11:52,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:52,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:11:52,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781722809] [2021-03-10 21:11:52,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:52,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:52,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:52,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:52,427 INFO L87 Difference]: Start difference. First operand 12057 states and 31573 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:52,561 INFO L93 Difference]: Finished difference Result 14272 states and 36292 transitions. [2021-03-10 21:11:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:11:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:52,576 INFO L225 Difference]: With dead ends: 14272 [2021-03-10 21:11:52,576 INFO L226 Difference]: Without dead ends: 14260 [2021-03-10 21:11:52,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14260 states. [2021-03-10 21:11:52,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14260 to 12057. [2021-03-10 21:11:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12057 states, 12056 states have (on average 2.618364299933643) internal successors, (31567), 12056 states have internal predecessors, (31567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12057 states to 12057 states and 31567 transitions. [2021-03-10 21:11:52,720 INFO L78 Accepts]: Start accepts. Automaton has 12057 states and 31567 transitions. Word has length 47 [2021-03-10 21:11:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:52,720 INFO L480 AbstractCegarLoop]: Abstraction has 12057 states and 31567 transitions. [2021-03-10 21:11:52,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 12057 states and 31567 transitions. [2021-03-10 21:11:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:52,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:52,726 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:52,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-03-10 21:11:52,927 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1830939413, now seen corresponding path program 140 times [2021-03-10 21:11:52,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:52,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620885996] [2021-03-10 21:11:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:52,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620885996] [2021-03-10 21:11:52,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977446256] [2021-03-10 21:11:52,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:53,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:53,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:53,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:11:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:11:53,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:53,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:11:53,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014972229] [2021-03-10 21:11:53,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:11:53,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:53,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:11:53,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:11:53,094 INFO L87 Difference]: Start difference. First operand 12057 states and 31567 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:53,543 INFO L93 Difference]: Finished difference Result 12695 states and 32752 transitions. [2021-03-10 21:11:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:53,543 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:53,556 INFO L225 Difference]: With dead ends: 12695 [2021-03-10 21:11:53,556 INFO L226 Difference]: Without dead ends: 12572 [2021-03-10 21:11:53,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12572 states. [2021-03-10 21:11:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12572 to 11820. [2021-03-10 21:11:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11820 states, 11819 states have (on average 2.621795414163635) internal successors, (30987), 11819 states have internal predecessors, (30987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11820 states to 11820 states and 30987 transitions. [2021-03-10 21:11:53,691 INFO L78 Accepts]: Start accepts. Automaton has 11820 states and 30987 transitions. Word has length 47 [2021-03-10 21:11:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:53,692 INFO L480 AbstractCegarLoop]: Abstraction has 11820 states and 30987 transitions. [2021-03-10 21:11:53,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 11820 states and 30987 transitions. [2021-03-10 21:11:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:53,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:53,698 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:53,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-03-10 21:11:53,898 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:53,898 INFO L82 PathProgramCache]: Analyzing trace with hash 596912380, now seen corresponding path program 141 times [2021-03-10 21:11:53,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:53,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704400477] [2021-03-10 21:11:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:53,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704400477] [2021-03-10 21:11:53,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296759560] [2021-03-10 21:11:53,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:53,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:11:53,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:53,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:54,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:54,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:11:54,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434151848] [2021-03-10 21:11:54,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:11:54,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:54,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:11:54,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:11:54,054 INFO L87 Difference]: Start difference. First operand 11820 states and 30987 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:54,201 INFO L93 Difference]: Finished difference Result 14028 states and 35670 transitions. [2021-03-10 21:11:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:11:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:54,216 INFO L225 Difference]: With dead ends: 14028 [2021-03-10 21:11:54,216 INFO L226 Difference]: Without dead ends: 14010 [2021-03-10 21:11:54,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14010 states. [2021-03-10 21:11:54,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14010 to 11993. [2021-03-10 21:11:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11993 states, 11992 states have (on average 2.628585723815877) internal successors, (31522), 11992 states have internal predecessors, (31522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11993 states to 11993 states and 31522 transitions. [2021-03-10 21:11:54,386 INFO L78 Accepts]: Start accepts. Automaton has 11993 states and 31522 transitions. Word has length 47 [2021-03-10 21:11:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:54,386 INFO L480 AbstractCegarLoop]: Abstraction has 11993 states and 31522 transitions. [2021-03-10 21:11:54,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 11993 states and 31522 transitions. [2021-03-10 21:11:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:54,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:54,392 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:54,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2021-03-10 21:11:54,592 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash -394207518, now seen corresponding path program 142 times [2021-03-10 21:11:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:54,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830093755] [2021-03-10 21:11:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:54,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830093755] [2021-03-10 21:11:54,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271873355] [2021-03-10 21:11:54,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:54,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:11:54,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:54,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:54,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:54,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:11:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70367198] [2021-03-10 21:11:54,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:11:54,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:54,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:11:54,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:11:54,758 INFO L87 Difference]: Start difference. First operand 11993 states and 31522 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:54,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:54,929 INFO L93 Difference]: Finished difference Result 14091 states and 35774 transitions. [2021-03-10 21:11:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:11:54,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:54,943 INFO L225 Difference]: With dead ends: 14091 [2021-03-10 21:11:54,944 INFO L226 Difference]: Without dead ends: 14064 [2021-03-10 21:11:54,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14064 states. [2021-03-10 21:11:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14064 to 11993. [2021-03-10 21:11:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11993 states, 11992 states have (on average 2.6283355570380253) internal successors, (31519), 11992 states have internal predecessors, (31519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11993 states to 11993 states and 31519 transitions. [2021-03-10 21:11:55,089 INFO L78 Accepts]: Start accepts. Automaton has 11993 states and 31519 transitions. Word has length 47 [2021-03-10 21:11:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:55,090 INFO L480 AbstractCegarLoop]: Abstraction has 11993 states and 31519 transitions. [2021-03-10 21:11:55,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 11993 states and 31519 transitions. [2021-03-10 21:11:55,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:55,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:55,096 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:55,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:55,296 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:55,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1053071164, now seen corresponding path program 143 times [2021-03-10 21:11:55,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:55,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136436235] [2021-03-10 21:11:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:55,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136436235] [2021-03-10 21:11:55,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555194902] [2021-03-10 21:11:55,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:55,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:11:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:55,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:55,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:55,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-03-10 21:11:55,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55361160] [2021-03-10 21:11:55,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:11:55,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:55,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:11:55,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:11:55,492 INFO L87 Difference]: Start difference. First operand 11993 states and 31519 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:55,738 INFO L93 Difference]: Finished difference Result 14368 states and 36331 transitions. [2021-03-10 21:11:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:11:55,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:55,753 INFO L225 Difference]: With dead ends: 14368 [2021-03-10 21:11:55,753 INFO L226 Difference]: Without dead ends: 14332 [2021-03-10 21:11:55,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:11:55,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14332 states. [2021-03-10 21:11:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14332 to 11993. [2021-03-10 21:11:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11993 states, 11992 states have (on average 2.6280853902601735) internal successors, (31516), 11992 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11993 states to 11993 states and 31516 transitions. [2021-03-10 21:11:55,902 INFO L78 Accepts]: Start accepts. Automaton has 11993 states and 31516 transitions. Word has length 47 [2021-03-10 21:11:55,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:55,902 INFO L480 AbstractCegarLoop]: Abstraction has 11993 states and 31516 transitions. [2021-03-10 21:11:55,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 11993 states and 31516 transitions. [2021-03-10 21:11:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:55,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:55,908 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:56,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-03-10 21:11:56,109 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:56,109 INFO L82 PathProgramCache]: Analyzing trace with hash -244397918, now seen corresponding path program 144 times [2021-03-10 21:11:56,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:56,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106212664] [2021-03-10 21:11:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:56,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106212664] [2021-03-10 21:11:56,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719256696] [2021-03-10 21:11:56,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:56,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:11:56,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:56,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:56,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:56,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:11:56,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997513392] [2021-03-10 21:11:56,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:11:56,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:56,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:11:56,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:11:56,293 INFO L87 Difference]: Start difference. First operand 11993 states and 31516 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:56,510 INFO L93 Difference]: Finished difference Result 14376 states and 36287 transitions. [2021-03-10 21:11:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:11:56,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:56,525 INFO L225 Difference]: With dead ends: 14376 [2021-03-10 21:11:56,525 INFO L226 Difference]: Without dead ends: 14331 [2021-03-10 21:11:56,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:11:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14331 states. [2021-03-10 21:11:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14331 to 11993. [2021-03-10 21:11:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11993 states, 11992 states have (on average 2.6278352234823217) internal successors, (31513), 11992 states have internal predecessors, (31513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11993 states to 11993 states and 31513 transitions. [2021-03-10 21:11:56,671 INFO L78 Accepts]: Start accepts. Automaton has 11993 states and 31513 transitions. Word has length 47 [2021-03-10 21:11:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:56,671 INFO L480 AbstractCegarLoop]: Abstraction has 11993 states and 31513 transitions. [2021-03-10 21:11:56,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 11993 states and 31513 transitions. [2021-03-10 21:11:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:56,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:56,678 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:56,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-03-10 21:11:56,878 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:56,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:56,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1478005367, now seen corresponding path program 145 times [2021-03-10 21:11:56,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:56,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391397646] [2021-03-10 21:11:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:56,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391397646] [2021-03-10 21:11:56,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647121201] [2021-03-10 21:11:56,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:57,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:11:57,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:57,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:11:57,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-03-10 21:11:57,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:11:57,158 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-03-10 21:11:57,158 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:11:57,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:11:57,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-03-10 21:11:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:57,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:57,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 21:11:57,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478459769] [2021-03-10 21:11:57,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:11:57,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:57,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:11:57,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:11:57,167 INFO L87 Difference]: Start difference. First operand 11993 states and 31513 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:59,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:59,467 INFO L93 Difference]: Finished difference Result 24067 states and 58447 transitions. [2021-03-10 21:11:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-03-10 21:11:59,468 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:11:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:59,493 INFO L225 Difference]: With dead ends: 24067 [2021-03-10 21:11:59,493 INFO L226 Difference]: Without dead ends: 23396 [2021-03-10 21:11:59,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 1569.7ms TimeCoverageRelationStatistics Valid=1477, Invalid=13775, Unknown=0, NotChecked=0, Total=15252 [2021-03-10 21:11:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23396 states. [2021-03-10 21:11:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23396 to 15197. [2021-03-10 21:11:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15197 states, 15196 states have (on average 2.6318768096867595) internal successors, (39994), 15196 states have internal predecessors, (39994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15197 states to 15197 states and 39994 transitions. [2021-03-10 21:11:59,730 INFO L78 Accepts]: Start accepts. Automaton has 15197 states and 39994 transitions. Word has length 47 [2021-03-10 21:11:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:59,730 INFO L480 AbstractCegarLoop]: Abstraction has 15197 states and 39994 transitions. [2021-03-10 21:11:59,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 15197 states and 39994 transitions. [2021-03-10 21:11:59,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:11:59,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:59,736 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:59,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:59,937 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:59,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1239943850, now seen corresponding path program 83 times [2021-03-10 21:11:59,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:59,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654418591] [2021-03-10 21:11:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:59,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654418591] [2021-03-10 21:11:59,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454875431] [2021-03-10 21:11:59,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:00,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:12:00,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:00,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:12:00,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:00,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:00,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2021-03-10 21:12:00,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502553282] [2021-03-10 21:12:00,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:12:00,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:00,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:12:00,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:00,120 INFO L87 Difference]: Start difference. First operand 15197 states and 39994 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:00,372 INFO L93 Difference]: Finished difference Result 17242 states and 44306 transitions. [2021-03-10 21:12:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:12:00,372 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:12:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:00,391 INFO L225 Difference]: With dead ends: 17242 [2021-03-10 21:12:00,391 INFO L226 Difference]: Without dead ends: 17226 [2021-03-10 21:12:00,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:12:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2021-03-10 21:12:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 14465. [2021-03-10 21:12:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14465 states, 14464 states have (on average 2.6145602876106193) internal successors, (37817), 14464 states have internal predecessors, (37817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14465 states to 14465 states and 37817 transitions. [2021-03-10 21:12:00,630 INFO L78 Accepts]: Start accepts. Automaton has 14465 states and 37817 transitions. Word has length 47 [2021-03-10 21:12:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:00,630 INFO L480 AbstractCegarLoop]: Abstraction has 14465 states and 37817 transitions. [2021-03-10 21:12:00,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 14465 states and 37817 transitions. [2021-03-10 21:12:00,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:12:00,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:00,636 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:00,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-03-10 21:12:00,837 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash 618063440, now seen corresponding path program 84 times [2021-03-10 21:12:00,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:00,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320735770] [2021-03-10 21:12:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:00,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320735770] [2021-03-10 21:12:00,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265187244] [2021-03-10 21:12:00,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:00,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:12:00,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:00,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:12:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:00,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:00,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-03-10 21:12:00,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532748671] [2021-03-10 21:12:00,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:00,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:00,990 INFO L87 Difference]: Start difference. First operand 14465 states and 37817 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:01,221 INFO L93 Difference]: Finished difference Result 18659 states and 47018 transitions. [2021-03-10 21:12:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:12:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:12:01,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:01,243 INFO L225 Difference]: With dead ends: 18659 [2021-03-10 21:12:01,243 INFO L226 Difference]: Without dead ends: 18659 [2021-03-10 21:12:01,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18659 states. [2021-03-10 21:12:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18659 to 14479. [2021-03-10 21:12:01,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14479 states, 14478 states have (on average 2.6146567205415114) internal successors, (37855), 14478 states have internal predecessors, (37855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:01,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14479 states to 14479 states and 37855 transitions. [2021-03-10 21:12:01,447 INFO L78 Accepts]: Start accepts. Automaton has 14479 states and 37855 transitions. Word has length 47 [2021-03-10 21:12:01,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:01,447 INFO L480 AbstractCegarLoop]: Abstraction has 14479 states and 37855 transitions. [2021-03-10 21:12:01,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand 14479 states and 37855 transitions. [2021-03-10 21:12:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:12:01,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:01,454 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:01,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:01,654 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:01,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1019509016, now seen corresponding path program 85 times [2021-03-10 21:12:01,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:01,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154828526] [2021-03-10 21:12:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:01,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154828526] [2021-03-10 21:12:01,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950554158] [2021-03-10 21:12:01,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:12:01,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:01,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:01,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-03-10 21:12:01,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134350236] [2021-03-10 21:12:01,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:12:01,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:01,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:12:01,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:12:01,835 INFO L87 Difference]: Start difference. First operand 14479 states and 37855 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:02,234 INFO L93 Difference]: Finished difference Result 16775 states and 42545 transitions. [2021-03-10 21:12:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:12:02,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:12:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:02,253 INFO L225 Difference]: With dead ends: 16775 [2021-03-10 21:12:02,253 INFO L226 Difference]: Without dead ends: 16775 [2021-03-10 21:12:02,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:12:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16775 states. [2021-03-10 21:12:02,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16775 to 14081. [2021-03-10 21:12:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14081 states, 14080 states have (on average 2.628053977272727) internal successors, (37003), 14080 states have internal predecessors, (37003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14081 states to 14081 states and 37003 transitions. [2021-03-10 21:12:02,440 INFO L78 Accepts]: Start accepts. Automaton has 14081 states and 37003 transitions. Word has length 47 [2021-03-10 21:12:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:02,440 INFO L480 AbstractCegarLoop]: Abstraction has 14081 states and 37003 transitions. [2021-03-10 21:12:02,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 14081 states and 37003 transitions. [2021-03-10 21:12:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:12:02,446 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:02,446 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:02,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:02,647 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:02,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1559844220, now seen corresponding path program 146 times [2021-03-10 21:12:02,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:02,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009176360] [2021-03-10 21:12:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:02,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009176360] [2021-03-10 21:12:02,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145374894] [2021-03-10 21:12:02,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:02,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:12:02,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:02,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:12:02,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:02,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:02,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 21:12:02,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505290284] [2021-03-10 21:12:02,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:12:02,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:02,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:12:02,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:12:02,841 INFO L87 Difference]: Start difference. First operand 14081 states and 37003 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:03,075 INFO L93 Difference]: Finished difference Result 15863 states and 40647 transitions. [2021-03-10 21:12:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:12:03,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:12:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:03,094 INFO L225 Difference]: With dead ends: 15863 [2021-03-10 21:12:03,094 INFO L226 Difference]: Without dead ends: 15807 [2021-03-10 21:12:03,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:12:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15807 states. [2021-03-10 21:12:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15807 to 14090. [2021-03-10 21:12:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14090 states, 14089 states have (on average 2.6273688693306836) internal successors, (37017), 14089 states have internal predecessors, (37017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14090 states to 14090 states and 37017 transitions. [2021-03-10 21:12:03,334 INFO L78 Accepts]: Start accepts. Automaton has 14090 states and 37017 transitions. Word has length 47 [2021-03-10 21:12:03,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:03,334 INFO L480 AbstractCegarLoop]: Abstraction has 14090 states and 37017 transitions. [2021-03-10 21:12:03,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 14090 states and 37017 transitions. [2021-03-10 21:12:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:12:03,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:03,339 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:03,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:03,540 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:03,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:03,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1896171995, now seen corresponding path program 147 times [2021-03-10 21:12:03,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:03,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334152658] [2021-03-10 21:12:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:03,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334152658] [2021-03-10 21:12:03,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393005608] [2021-03-10 21:12:03,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:03,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:12:03,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:03,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:12:03,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:03,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:03,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:12:03,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075633164] [2021-03-10 21:12:03,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:12:03,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:03,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:12:03,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:03,685 INFO L87 Difference]: Start difference. First operand 14090 states and 37017 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:03,954 INFO L93 Difference]: Finished difference Result 16589 states and 42624 transitions. [2021-03-10 21:12:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:12:03,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:12:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:03,971 INFO L225 Difference]: With dead ends: 16589 [2021-03-10 21:12:03,972 INFO L226 Difference]: Without dead ends: 16548 [2021-03-10 21:12:03,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16548 states. [2021-03-10 21:12:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16548 to 15618. [2021-03-10 21:12:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15618 states, 15617 states have (on average 2.60645450470641) internal successors, (40705), 15617 states have internal predecessors, (40705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15618 states to 15618 states and 40705 transitions. [2021-03-10 21:12:04,161 INFO L78 Accepts]: Start accepts. Automaton has 15618 states and 40705 transitions. Word has length 50 [2021-03-10 21:12:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:04,161 INFO L480 AbstractCegarLoop]: Abstraction has 15618 states and 40705 transitions. [2021-03-10 21:12:04,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:04,161 INFO L276 IsEmpty]: Start isEmpty. Operand 15618 states and 40705 transitions. [2021-03-10 21:12:04,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:12:04,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:04,169 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:04,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:04,369 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:04,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1860539001, now seen corresponding path program 148 times [2021-03-10 21:12:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:04,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65330425] [2021-03-10 21:12:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:12:04,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65330425] [2021-03-10 21:12:04,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895433526] [2021-03-10 21:12:04,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:04,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:12:04,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:04,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:12:04,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:12:04,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:04,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:12:04,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659465151] [2021-03-10 21:12:04,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:12:04,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:12:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:04,509 INFO L87 Difference]: Start difference. First operand 15618 states and 40705 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:04,782 INFO L93 Difference]: Finished difference Result 17323 states and 44223 transitions. [2021-03-10 21:12:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:12:04,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:12:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:04,801 INFO L225 Difference]: With dead ends: 17323 [2021-03-10 21:12:04,801 INFO L226 Difference]: Without dead ends: 17257 [2021-03-10 21:12:04,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:04,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17257 states. [2021-03-10 21:12:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17257 to 15711. [2021-03-10 21:12:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15711 states, 15710 states have (on average 2.6045194143857415) internal successors, (40917), 15710 states have internal predecessors, (40917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15711 states to 15711 states and 40917 transitions. [2021-03-10 21:12:05,001 INFO L78 Accepts]: Start accepts. Automaton has 15711 states and 40917 transitions. Word has length 50 [2021-03-10 21:12:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:05,002 INFO L480 AbstractCegarLoop]: Abstraction has 15711 states and 40917 transitions. [2021-03-10 21:12:05,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 15711 states and 40917 transitions. [2021-03-10 21:12:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:12:05,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:05,010 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:05,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:05,210 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash -7628392, now seen corresponding path program 4 times [2021-03-10 21:12:05,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:05,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878849824] [2021-03-10 21:12:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:05,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878849824] [2021-03-10 21:12:05,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877740267] [2021-03-10 21:12:05,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:05,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:12:05,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:05,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:12:05,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:05,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:05,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 21:12:05,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859180207] [2021-03-10 21:12:05,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:12:05,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:05,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:12:05,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:12:05,569 INFO L87 Difference]: Start difference. First operand 15711 states and 40917 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:06,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:06,189 INFO L93 Difference]: Finished difference Result 15801 states and 41044 transitions. [2021-03-10 21:12:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:12:06,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:12:06,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:06,206 INFO L225 Difference]: With dead ends: 15801 [2021-03-10 21:12:06,207 INFO L226 Difference]: Without dead ends: 15659 [2021-03-10 21:12:06,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:12:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15659 states. [2021-03-10 21:12:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15659 to 15633. [2021-03-10 21:12:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15633 states, 15632 states have (on average 2.606704196519959) internal successors, (40748), 15632 states have internal predecessors, (40748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15633 states to 15633 states and 40748 transitions. [2021-03-10 21:12:06,439 INFO L78 Accepts]: Start accepts. Automaton has 15633 states and 40748 transitions. Word has length 50 [2021-03-10 21:12:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:06,439 INFO L480 AbstractCegarLoop]: Abstraction has 15633 states and 40748 transitions. [2021-03-10 21:12:06,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 15633 states and 40748 transitions. [2021-03-10 21:12:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:12:06,446 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:06,446 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:06,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:06,646 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:06,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1761499875, now seen corresponding path program 149 times [2021-03-10 21:12:06,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:06,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262971481] [2021-03-10 21:12:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:12:06,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262971481] [2021-03-10 21:12:06,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294574475] [2021-03-10 21:12:06,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:06,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:12:06,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:12:06,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:12:06,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:06,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:12:06,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645363101] [2021-03-10 21:12:06,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:12:06,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:12:06,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:06,792 INFO L87 Difference]: Start difference. First operand 15633 states and 40748 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:07,060 INFO L93 Difference]: Finished difference Result 16924 states and 43372 transitions. [2021-03-10 21:12:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:12:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:12:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:07,078 INFO L225 Difference]: With dead ends: 16924 [2021-03-10 21:12:07,078 INFO L226 Difference]: Without dead ends: 16861 [2021-03-10 21:12:07,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16861 states. [2021-03-10 21:12:07,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16861 to 15651. [2021-03-10 21:12:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15651 states, 15650 states have (on average 2.605367412140575) internal successors, (40774), 15650 states have internal predecessors, (40774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15651 states to 15651 states and 40774 transitions. [2021-03-10 21:12:07,268 INFO L78 Accepts]: Start accepts. Automaton has 15651 states and 40774 transitions. Word has length 50 [2021-03-10 21:12:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:07,268 INFO L480 AbstractCegarLoop]: Abstraction has 15651 states and 40774 transitions. [2021-03-10 21:12:07,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 15651 states and 40774 transitions. [2021-03-10 21:12:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:12:07,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:07,276 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:07,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-03-10 21:12:07,476 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash -836689913, now seen corresponding path program 150 times [2021-03-10 21:12:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:07,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347227545] [2021-03-10 21:12:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:12:07,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347227545] [2021-03-10 21:12:07,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146264252] [2021-03-10 21:12:07,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:07,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-03-10 21:12:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:12:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:12:07,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:07,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:12:07,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088878081] [2021-03-10 21:12:07,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:12:07,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:07,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:12:07,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:07,621 INFO L87 Difference]: Start difference. First operand 15651 states and 40774 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:07,893 INFO L93 Difference]: Finished difference Result 16830 states and 43166 transitions. [2021-03-10 21:12:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:12:07,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:12:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:07,911 INFO L225 Difference]: With dead ends: 16830 [2021-03-10 21:12:07,911 INFO L226 Difference]: Without dead ends: 16789 [2021-03-10 21:12:07,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16789 states. [2021-03-10 21:12:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16789 to 15696. [2021-03-10 21:12:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15696 states, 15695 states have (on average 2.603185727938834) internal successors, (40857), 15695 states have internal predecessors, (40857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15696 states to 15696 states and 40857 transitions. [2021-03-10 21:12:08,098 INFO L78 Accepts]: Start accepts. Automaton has 15696 states and 40857 transitions. Word has length 50 [2021-03-10 21:12:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:08,098 INFO L480 AbstractCegarLoop]: Abstraction has 15696 states and 40857 transitions. [2021-03-10 21:12:08,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 15696 states and 40857 transitions. [2021-03-10 21:12:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:12:08,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:08,105 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:08,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:08,306 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:08,306 INFO L82 PathProgramCache]: Analyzing trace with hash 391944291, now seen corresponding path program 151 times [2021-03-10 21:12:08,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:08,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716111420] [2021-03-10 21:12:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:12:08,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716111420] [2021-03-10 21:12:08,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809353228] [2021-03-10 21:12:08,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:12:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:12:08,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:08,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:12:08,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219790387] [2021-03-10 21:12:08,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:12:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:12:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:08,448 INFO L87 Difference]: Start difference. First operand 15696 states and 40857 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:08,723 INFO L93 Difference]: Finished difference Result 16674 states and 42851 transitions. [2021-03-10 21:12:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:12:08,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:12:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:08,741 INFO L225 Difference]: With dead ends: 16674 [2021-03-10 21:12:08,741 INFO L226 Difference]: Without dead ends: 16637 [2021-03-10 21:12:08,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16637 states. [2021-03-10 21:12:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16637 to 15768. [2021-03-10 21:12:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15768 states, 15767 states have (on average 2.5999873152787467) internal successors, (40994), 15767 states have internal predecessors, (40994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15768 states to 15768 states and 40994 transitions. [2021-03-10 21:12:08,931 INFO L78 Accepts]: Start accepts. Automaton has 15768 states and 40994 transitions. Word has length 50 [2021-03-10 21:12:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:08,931 INFO L480 AbstractCegarLoop]: Abstraction has 15768 states and 40994 transitions. [2021-03-10 21:12:08,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 15768 states and 40994 transitions. [2021-03-10 21:12:08,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:12:08,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:08,939 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:09,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-03-10 21:12:09,139 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:09,140 INFO L82 PathProgramCache]: Analyzing trace with hash 922219143, now seen corresponding path program 152 times [2021-03-10 21:12:09,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:09,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879448524] [2021-03-10 21:12:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:12:09,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879448524] [2021-03-10 21:12:09,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246709382] [2021-03-10 21:12:09,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:09,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:12:09,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:09,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:12:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:12:09,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:09,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 21:12:09,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425264459] [2021-03-10 21:12:09,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:12:09,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:09,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:12:09,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:09,343 INFO L87 Difference]: Start difference. First operand 15768 states and 40994 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:09,619 INFO L93 Difference]: Finished difference Result 16826 states and 43144 transitions. [2021-03-10 21:12:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:12:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:12:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:09,637 INFO L225 Difference]: With dead ends: 16826 [2021-03-10 21:12:09,638 INFO L226 Difference]: Without dead ends: 16787 [2021-03-10 21:12:09,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:12:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16787 states. [2021-03-10 21:12:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16787 to 15867. [2021-03-10 21:12:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15867 states, 15866 states have (on average 2.5954872053447624) internal successors, (41180), 15866 states have internal predecessors, (41180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:09,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15867 states to 15867 states and 41180 transitions. [2021-03-10 21:12:09,829 INFO L78 Accepts]: Start accepts. Automaton has 15867 states and 41180 transitions. Word has length 50 [2021-03-10 21:12:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:09,829 INFO L480 AbstractCegarLoop]: Abstraction has 15867 states and 41180 transitions. [2021-03-10 21:12:09,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 15867 states and 41180 transitions. [2021-03-10 21:12:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:12:09,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:09,837 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:10,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-03-10 21:12:10,037 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:10,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1980912872, now seen corresponding path program 5 times [2021-03-10 21:12:10,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:10,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800321022] [2021-03-10 21:12:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:10,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800321022] [2021-03-10 21:12:10,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883969472] [2021-03-10 21:12:10,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:10,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:12:10,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:12:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:10,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:10,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 21:12:10,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021846266] [2021-03-10 21:12:10,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:12:10,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:12:10,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:12:10,357 INFO L87 Difference]: Start difference. First operand 15867 states and 41180 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:10,854 INFO L93 Difference]: Finished difference Result 15981 states and 41361 transitions. [2021-03-10 21:12:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:12:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:12:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:10,872 INFO L225 Difference]: With dead ends: 15981 [2021-03-10 21:12:10,872 INFO L226 Difference]: Without dead ends: 15863 [2021-03-10 21:12:10,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:12:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15863 states. [2021-03-10 21:12:11,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15863 to 15837. [2021-03-10 21:12:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15837 states, 15836 states have (on average 2.5957943925233646) internal successors, (41107), 15836 states have internal predecessors, (41107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15837 states to 15837 states and 41107 transitions. [2021-03-10 21:12:11,050 INFO L78 Accepts]: Start accepts. Automaton has 15837 states and 41107 transitions. Word has length 50 [2021-03-10 21:12:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:11,050 INFO L480 AbstractCegarLoop]: Abstraction has 15837 states and 41107 transitions. [2021-03-10 21:12:11,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 15837 states and 41107 transitions. [2021-03-10 21:12:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:12:11,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:11,058 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:11,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:11,258 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:11,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:11,258 INFO L82 PathProgramCache]: Analyzing trace with hash 365630326, now seen corresponding path program 6 times [2021-03-10 21:12:11,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:11,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181258334] [2021-03-10 21:12:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:11,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181258334] [2021-03-10 21:12:11,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869743441] [2021-03-10 21:12:11,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:11,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:12:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:11,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:12:11,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:11,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:11,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 21:12:11,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971221715] [2021-03-10 21:12:11,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:12:11,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:11,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:12:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:12:11,533 INFO L87 Difference]: Start difference. First operand 15837 states and 41107 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:11,953 INFO L93 Difference]: Finished difference Result 15901 states and 41192 transitions. [2021-03-10 21:12:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:12:11,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:12:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:11,971 INFO L225 Difference]: With dead ends: 15901 [2021-03-10 21:12:11,971 INFO L226 Difference]: Without dead ends: 15807 [2021-03-10 21:12:11,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:12:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15807 states. [2021-03-10 21:12:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15807 to 15781. [2021-03-10 21:12:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15781 states, 15780 states have (on average 2.597148288973384) internal successors, (40983), 15780 states have internal predecessors, (40983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15781 states to 15781 states and 40983 transitions. [2021-03-10 21:12:12,151 INFO L78 Accepts]: Start accepts. Automaton has 15781 states and 40983 transitions. Word has length 50 [2021-03-10 21:12:12,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:12,151 INFO L480 AbstractCegarLoop]: Abstraction has 15781 states and 40983 transitions. [2021-03-10 21:12:12,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 15781 states and 40983 transitions. [2021-03-10 21:12:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:12,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:12,221 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:12,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-03-10 21:12:12,421 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:12,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:12,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2070322197, now seen corresponding path program 153 times [2021-03-10 21:12:12,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:12,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107831158] [2021-03-10 21:12:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:12,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107831158] [2021-03-10 21:12:12,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30169479] [2021-03-10 21:12:12,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:12,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:12:12,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:12,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:12,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:12,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-03-10 21:12:12,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275633223] [2021-03-10 21:12:12,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:12:12,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:12:12,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:12,670 INFO L87 Difference]: Start difference. First operand 15781 states and 40983 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:13,103 INFO L93 Difference]: Finished difference Result 18719 states and 47320 transitions. [2021-03-10 21:12:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:12:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:13,123 INFO L225 Difference]: With dead ends: 18719 [2021-03-10 21:12:13,123 INFO L226 Difference]: Without dead ends: 18719 [2021-03-10 21:12:13,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:12:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18719 states. [2021-03-10 21:12:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18719 to 16149. [2021-03-10 21:12:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16149 states, 16148 states have (on average 2.5997646767401537) internal successors, (41981), 16148 states have internal predecessors, (41981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16149 states to 16149 states and 41981 transitions. [2021-03-10 21:12:13,326 INFO L78 Accepts]: Start accepts. Automaton has 16149 states and 41981 transitions. Word has length 53 [2021-03-10 21:12:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:13,326 INFO L480 AbstractCegarLoop]: Abstraction has 16149 states and 41981 transitions. [2021-03-10 21:12:13,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 16149 states and 41981 transitions. [2021-03-10 21:12:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:13,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:13,335 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:13,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:13,536 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:13,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1040519320, now seen corresponding path program 86 times [2021-03-10 21:12:13,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:13,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711672201] [2021-03-10 21:12:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:13,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711672201] [2021-03-10 21:12:13,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688067554] [2021-03-10 21:12:13,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:13,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:12:13,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:13,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:12:13,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:14,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:12:14,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:12:14,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:12:14,482 INFO L628 ElimStorePlain]: treesize reduction 19, result has 5.0 percent of original size [2021-03-10 21:12:14,482 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:12:14,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:12:14,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:1 [2021-03-10 21:12:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 52 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:14,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:14,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-03-10 21:12:14,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823337691] [2021-03-10 21:12:14,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 21:12:14,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:14,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 21:12:14,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:12:14,489 INFO L87 Difference]: Start difference. First operand 16149 states and 41981 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:26,368 INFO L93 Difference]: Finished difference Result 34514 states and 82893 transitions. [2021-03-10 21:12:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-03-10 21:12:26,369 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:26,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:26,407 INFO L225 Difference]: With dead ends: 34514 [2021-03-10 21:12:26,407 INFO L226 Difference]: Without dead ends: 33666 [2021-03-10 21:12:26,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25560 ImplicationChecksByTransitivity, 9998.3ms TimeCoverageRelationStatistics Valid=7737, Invalid=56525, Unknown=0, NotChecked=0, Total=64262 [2021-03-10 21:12:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33666 states. [2021-03-10 21:12:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33666 to 17615. [2021-03-10 21:12:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17615 states, 17614 states have (on average 2.6037810832292494) internal successors, (45863), 17614 states have internal predecessors, (45863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17615 states to 17615 states and 45863 transitions. [2021-03-10 21:12:26,716 INFO L78 Accepts]: Start accepts. Automaton has 17615 states and 45863 transitions. Word has length 53 [2021-03-10 21:12:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:26,716 INFO L480 AbstractCegarLoop]: Abstraction has 17615 states and 45863 transitions. [2021-03-10 21:12:26,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:26,716 INFO L276 IsEmpty]: Start isEmpty. Operand 17615 states and 45863 transitions. [2021-03-10 21:12:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:26,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:26,726 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:26,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-03-10 21:12:26,926 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:26,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:26,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1015136727, now seen corresponding path program 154 times [2021-03-10 21:12:26,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:26,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365936134] [2021-03-10 21:12:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:26,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365936134] [2021-03-10 21:12:26,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059775181] [2021-03-10 21:12:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:27,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:12:27,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:27,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:27,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:27,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:27,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:12:27,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952954021] [2021-03-10 21:12:27,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:27,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:27,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:27,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:27,099 INFO L87 Difference]: Start difference. First operand 17615 states and 45863 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:27,310 INFO L93 Difference]: Finished difference Result 19186 states and 48955 transitions. [2021-03-10 21:12:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:12:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:27,331 INFO L225 Difference]: With dead ends: 19186 [2021-03-10 21:12:27,331 INFO L226 Difference]: Without dead ends: 19183 [2021-03-10 21:12:27,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:12:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19183 states. [2021-03-10 21:12:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19183 to 17296. [2021-03-10 21:12:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17296 states, 17295 states have (on average 2.599595258745302) internal successors, (44960), 17295 states have internal predecessors, (44960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17296 states to 17296 states and 44960 transitions. [2021-03-10 21:12:27,628 INFO L78 Accepts]: Start accepts. Automaton has 17296 states and 44960 transitions. Word has length 53 [2021-03-10 21:12:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:27,628 INFO L480 AbstractCegarLoop]: Abstraction has 17296 states and 44960 transitions. [2021-03-10 21:12:27,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 17296 states and 44960 transitions. [2021-03-10 21:12:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:27,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:27,637 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:27,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-03-10 21:12:27,837 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash 521259383, now seen corresponding path program 155 times [2021-03-10 21:12:27,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:27,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055245216] [2021-03-10 21:12:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 77 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:27,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055245216] [2021-03-10 21:12:27,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958957356] [2021-03-10 21:12:27,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:27,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:12:27,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:27,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:27,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:28,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:28,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2021-03-10 21:12:28,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305295511] [2021-03-10 21:12:28,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:12:28,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:28,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:12:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:12:28,051 INFO L87 Difference]: Start difference. First operand 17296 states and 44960 transitions. Second operand has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:28,351 INFO L93 Difference]: Finished difference Result 19024 states and 48657 transitions. [2021-03-10 21:12:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:12:28,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:28,372 INFO L225 Difference]: With dead ends: 19024 [2021-03-10 21:12:28,373 INFO L226 Difference]: Without dead ends: 19012 [2021-03-10 21:12:28,373 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:12:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19012 states. [2021-03-10 21:12:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19012 to 17296. [2021-03-10 21:12:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17296 states, 17295 states have (on average 2.599248337669847) internal successors, (44954), 17295 states have internal predecessors, (44954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17296 states to 17296 states and 44954 transitions. [2021-03-10 21:12:28,593 INFO L78 Accepts]: Start accepts. Automaton has 17296 states and 44954 transitions. Word has length 53 [2021-03-10 21:12:28,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:28,594 INFO L480 AbstractCegarLoop]: Abstraction has 17296 states and 44954 transitions. [2021-03-10 21:12:28,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 17296 states and 44954 transitions. [2021-03-10 21:12:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:28,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:28,603 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:28,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:28,803 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:28,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2009696104, now seen corresponding path program 156 times [2021-03-10 21:12:28,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:28,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278316503] [2021-03-10 21:12:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:28,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278316503] [2021-03-10 21:12:28,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686203963] [2021-03-10 21:12:28,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:28,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:12:28,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:28,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:29,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:29,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 21:12:29,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622144514] [2021-03-10 21:12:29,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:12:29,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:29,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:12:29,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:12:29,214 INFO L87 Difference]: Start difference. First operand 17296 states and 44954 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:30,092 INFO L93 Difference]: Finished difference Result 17603 states and 45498 transitions. [2021-03-10 21:12:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:12:30,093 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:30,111 INFO L225 Difference]: With dead ends: 17603 [2021-03-10 21:12:30,112 INFO L226 Difference]: Without dead ends: 17301 [2021-03-10 21:12:30,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:12:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17301 states. [2021-03-10 21:12:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17301 to 17150. [2021-03-10 21:12:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17150 states, 17149 states have (on average 2.595195055105254) internal successors, (44505), 17149 states have internal predecessors, (44505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17150 states to 17150 states and 44505 transitions. [2021-03-10 21:12:30,317 INFO L78 Accepts]: Start accepts. Automaton has 17150 states and 44505 transitions. Word has length 53 [2021-03-10 21:12:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:30,317 INFO L480 AbstractCegarLoop]: Abstraction has 17150 states and 44505 transitions. [2021-03-10 21:12:30,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 17150 states and 44505 transitions. [2021-03-10 21:12:30,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:30,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:30,327 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:30,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:30,527 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:30,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:30,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1609870245, now seen corresponding path program 87 times [2021-03-10 21:12:30,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:30,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818762811] [2021-03-10 21:12:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 79 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:30,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818762811] [2021-03-10 21:12:30,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50436414] [2021-03-10 21:12:30,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:30,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:12:30,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:30,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:30,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:30,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:30,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:12:30,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728525845] [2021-03-10 21:12:30,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:12:30,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:30,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:12:30,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:12:30,714 INFO L87 Difference]: Start difference. First operand 17150 states and 44505 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:30,919 INFO L93 Difference]: Finished difference Result 22414 states and 56326 transitions. [2021-03-10 21:12:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:12:30,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:30,945 INFO L225 Difference]: With dead ends: 22414 [2021-03-10 21:12:30,945 INFO L226 Difference]: Without dead ends: 22414 [2021-03-10 21:12:30,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:12:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22414 states. [2021-03-10 21:12:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22414 to 18186. [2021-03-10 21:12:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18186 states, 18185 states have (on average 2.617596920538906) internal successors, (47601), 18185 states have internal predecessors, (47601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18186 states to 18186 states and 47601 transitions. [2021-03-10 21:12:31,203 INFO L78 Accepts]: Start accepts. Automaton has 18186 states and 47601 transitions. Word has length 53 [2021-03-10 21:12:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:31,203 INFO L480 AbstractCegarLoop]: Abstraction has 18186 states and 47601 transitions. [2021-03-10 21:12:31,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 18186 states and 47601 transitions. [2021-03-10 21:12:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:31,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:31,285 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:31,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:31,485 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1194965254, now seen corresponding path program 88 times [2021-03-10 21:12:31,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:31,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449417063] [2021-03-10 21:12:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:31,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449417063] [2021-03-10 21:12:31,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718474671] [2021-03-10 21:12:31,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:31,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:12:31,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:31,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:31,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:12:31,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257184454] [2021-03-10 21:12:31,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:31,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:31,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:31,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:31,694 INFO L87 Difference]: Start difference. First operand 18186 states and 47601 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:32,135 INFO L93 Difference]: Finished difference Result 20262 states and 51992 transitions. [2021-03-10 21:12:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:12:32,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:32,160 INFO L225 Difference]: With dead ends: 20262 [2021-03-10 21:12:32,160 INFO L226 Difference]: Without dead ends: 20211 [2021-03-10 21:12:32,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20211 states. [2021-03-10 21:12:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20211 to 18617. [2021-03-10 21:12:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18617 states, 18616 states have (on average 2.613289643317576) internal successors, (48649), 18616 states have internal predecessors, (48649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18617 states to 18617 states and 48649 transitions. [2021-03-10 21:12:32,418 INFO L78 Accepts]: Start accepts. Automaton has 18617 states and 48649 transitions. Word has length 53 [2021-03-10 21:12:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:32,418 INFO L480 AbstractCegarLoop]: Abstraction has 18617 states and 48649 transitions. [2021-03-10 21:12:32,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 18617 states and 48649 transitions. [2021-03-10 21:12:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:32,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:32,429 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:32,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-03-10 21:12:32,643 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:32,644 INFO L82 PathProgramCache]: Analyzing trace with hash -358731603, now seen corresponding path program 157 times [2021-03-10 21:12:32,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:32,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762397674] [2021-03-10 21:12:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:32,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762397674] [2021-03-10 21:12:32,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114070727] [2021-03-10 21:12:32,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:32,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:32,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:32,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:32,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:12:32,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933697976] [2021-03-10 21:12:32,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:12:32,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:32,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:12:32,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:12:32,863 INFO L87 Difference]: Start difference. First operand 18617 states and 48649 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:33,044 INFO L93 Difference]: Finished difference Result 20664 states and 52847 transitions. [2021-03-10 21:12:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:12:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:33,067 INFO L225 Difference]: With dead ends: 20664 [2021-03-10 21:12:33,067 INFO L226 Difference]: Without dead ends: 20661 [2021-03-10 21:12:33,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20661 states. [2021-03-10 21:12:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20661 to 18591. [2021-03-10 21:12:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18591 states, 18590 states have (on average 2.611888111888112) internal successors, (48555), 18590 states have internal predecessors, (48555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18591 states to 18591 states and 48555 transitions. [2021-03-10 21:12:33,307 INFO L78 Accepts]: Start accepts. Automaton has 18591 states and 48555 transitions. Word has length 53 [2021-03-10 21:12:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:33,307 INFO L480 AbstractCegarLoop]: Abstraction has 18591 states and 48555 transitions. [2021-03-10 21:12:33,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 18591 states and 48555 transitions. [2021-03-10 21:12:33,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:33,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:33,317 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:33,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-03-10 21:12:33,517 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash -151669037, now seen corresponding path program 158 times [2021-03-10 21:12:33,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:33,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671159935] [2021-03-10 21:12:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:33,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671159935] [2021-03-10 21:12:33,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559902039] [2021-03-10 21:12:33,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:33,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:12:33,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:33,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:33,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:33,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:12:33,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974481546] [2021-03-10 21:12:33,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:33,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:33,685 INFO L87 Difference]: Start difference. First operand 18591 states and 48555 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:33,890 INFO L93 Difference]: Finished difference Result 20671 states and 52797 transitions. [2021-03-10 21:12:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:12:33,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:33,914 INFO L225 Difference]: With dead ends: 20671 [2021-03-10 21:12:33,915 INFO L226 Difference]: Without dead ends: 20653 [2021-03-10 21:12:33,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:12:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20653 states. [2021-03-10 21:12:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20653 to 18428. [2021-03-10 21:12:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18428 states, 18427 states have (on average 2.603245237966028) internal successors, (47970), 18427 states have internal predecessors, (47970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 47970 transitions. [2021-03-10 21:12:34,155 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 47970 transitions. Word has length 53 [2021-03-10 21:12:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:34,155 INFO L480 AbstractCegarLoop]: Abstraction has 18428 states and 47970 transitions. [2021-03-10 21:12:34,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 47970 transitions. [2021-03-10 21:12:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:34,165 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:34,165 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:34,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-03-10 21:12:34,366 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1599669050, now seen corresponding path program 159 times [2021-03-10 21:12:34,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:34,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086386986] [2021-03-10 21:12:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:34,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086386986] [2021-03-10 21:12:34,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248866248] [2021-03-10 21:12:34,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:34,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:12:34,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:34,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:34,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:34,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:34,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:12:34,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333505873] [2021-03-10 21:12:34,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:34,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:34,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:34,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:34,568 INFO L87 Difference]: Start difference. First operand 18428 states and 47970 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:35,194 INFO L93 Difference]: Finished difference Result 19276 states and 49538 transitions. [2021-03-10 21:12:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:12:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:35,218 INFO L225 Difference]: With dead ends: 19276 [2021-03-10 21:12:35,218 INFO L226 Difference]: Without dead ends: 19220 [2021-03-10 21:12:35,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19220 states. [2021-03-10 21:12:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19220 to 18392. [2021-03-10 21:12:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18392 states, 18391 states have (on average 2.6025773476156817) internal successors, (47864), 18391 states have internal predecessors, (47864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18392 states to 18392 states and 47864 transitions. [2021-03-10 21:12:35,452 INFO L78 Accepts]: Start accepts. Automaton has 18392 states and 47864 transitions. Word has length 53 [2021-03-10 21:12:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:35,452 INFO L480 AbstractCegarLoop]: Abstraction has 18392 states and 47864 transitions. [2021-03-10 21:12:35,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 18392 states and 47864 transitions. [2021-03-10 21:12:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:35,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:35,462 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:35,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:35,662 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:35,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2081762066, now seen corresponding path program 160 times [2021-03-10 21:12:35,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:35,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403608915] [2021-03-10 21:12:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:35,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403608915] [2021-03-10 21:12:35,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14963316] [2021-03-10 21:12:35,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:35,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:12:35,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:35,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:35,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:35,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:35,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:12:35,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970460882] [2021-03-10 21:12:35,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:35,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:35,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:35,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:35,866 INFO L87 Difference]: Start difference. First operand 18392 states and 47864 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:36,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:36,325 INFO L93 Difference]: Finished difference Result 19509 states and 50084 transitions. [2021-03-10 21:12:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:12:36,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:36,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:36,346 INFO L225 Difference]: With dead ends: 19509 [2021-03-10 21:12:36,346 INFO L226 Difference]: Without dead ends: 19468 [2021-03-10 21:12:36,346 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19468 states. [2021-03-10 21:12:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19468 to 18191. [2021-03-10 21:12:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18191 states, 18190 states have (on average 2.604068169323804) internal successors, (47368), 18190 states have internal predecessors, (47368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18191 states to 18191 states and 47368 transitions. [2021-03-10 21:12:36,577 INFO L78 Accepts]: Start accepts. Automaton has 18191 states and 47368 transitions. Word has length 53 [2021-03-10 21:12:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:36,577 INFO L480 AbstractCegarLoop]: Abstraction has 18191 states and 47368 transitions. [2021-03-10 21:12:36,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:36,577 INFO L276 IsEmpty]: Start isEmpty. Operand 18191 states and 47368 transitions. [2021-03-10 21:12:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:36,587 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:36,587 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:36,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:36,788 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:36,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:36,788 INFO L82 PathProgramCache]: Analyzing trace with hash -71287896, now seen corresponding path program 161 times [2021-03-10 21:12:36,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:36,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626933581] [2021-03-10 21:12:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626933581] [2021-03-10 21:12:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790470298] [2021-03-10 21:12:36,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:36,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:12:36,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:36,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:36,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:36,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:12:36,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540244342] [2021-03-10 21:12:36,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:12:36,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:36,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:12:36,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:12:36,990 INFO L87 Difference]: Start difference. First operand 18191 states and 47368 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:37,579 INFO L93 Difference]: Finished difference Result 19866 states and 50762 transitions. [2021-03-10 21:12:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:12:37,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:37,601 INFO L225 Difference]: With dead ends: 19866 [2021-03-10 21:12:37,601 INFO L226 Difference]: Without dead ends: 19854 [2021-03-10 21:12:37,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:12:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19854 states. [2021-03-10 21:12:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19854 to 18226. [2021-03-10 21:12:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18226 states, 18225 states have (on average 2.603731138545953) internal successors, (47453), 18225 states have internal predecessors, (47453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:37,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18226 states to 18226 states and 47453 transitions. [2021-03-10 21:12:37,832 INFO L78 Accepts]: Start accepts. Automaton has 18226 states and 47453 transitions. Word has length 53 [2021-03-10 21:12:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:37,832 INFO L480 AbstractCegarLoop]: Abstraction has 18226 states and 47453 transitions. [2021-03-10 21:12:37,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand 18226 states and 47453 transitions. [2021-03-10 21:12:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:37,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:37,842 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:38,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:38,042 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash -309349413, now seen corresponding path program 89 times [2021-03-10 21:12:38,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:38,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874431582] [2021-03-10 21:12:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:38,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874431582] [2021-03-10 21:12:38,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715899613] [2021-03-10 21:12:38,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:38,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:12:38,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:38,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:38,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:38,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:38,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-03-10 21:12:38,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988953019] [2021-03-10 21:12:38,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:12:38,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:12:38,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:12:38,232 INFO L87 Difference]: Start difference. First operand 18226 states and 47453 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:38,500 INFO L93 Difference]: Finished difference Result 22269 states and 55820 transitions. [2021-03-10 21:12:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:12:38,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:38,523 INFO L225 Difference]: With dead ends: 22269 [2021-03-10 21:12:38,524 INFO L226 Difference]: Without dead ends: 22261 [2021-03-10 21:12:38,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:12:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22261 states. [2021-03-10 21:12:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22261 to 18490. [2021-03-10 21:12:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18490 states, 18489 states have (on average 2.6109578668397426) internal successors, (48274), 18489 states have internal predecessors, (48274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18490 states to 18490 states and 48274 transitions. [2021-03-10 21:12:38,772 INFO L78 Accepts]: Start accepts. Automaton has 18490 states and 48274 transitions. Word has length 53 [2021-03-10 21:12:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:38,772 INFO L480 AbstractCegarLoop]: Abstraction has 18490 states and 48274 transitions. [2021-03-10 21:12:38,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 18490 states and 48274 transitions. [2021-03-10 21:12:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:38,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:38,782 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:38,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:38,983 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:38,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:38,983 INFO L82 PathProgramCache]: Analyzing trace with hash -931229823, now seen corresponding path program 90 times [2021-03-10 21:12:38,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:38,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273396966] [2021-03-10 21:12:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:12:39,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273396966] [2021-03-10 21:12:39,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007460951] [2021-03-10 21:12:39,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:39,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:12:39,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:39,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:39,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:39,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:39,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-03-10 21:12:39,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59684865] [2021-03-10 21:12:39,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:12:39,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:39,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:12:39,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:12:39,175 INFO L87 Difference]: Start difference. First operand 18490 states and 48274 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:39,427 INFO L93 Difference]: Finished difference Result 24326 states and 60671 transitions. [2021-03-10 21:12:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:12:39,428 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:39,455 INFO L225 Difference]: With dead ends: 24326 [2021-03-10 21:12:39,455 INFO L226 Difference]: Without dead ends: 24326 [2021-03-10 21:12:39,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:12:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24326 states. [2021-03-10 21:12:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24326 to 18498. [2021-03-10 21:12:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18498 states, 18497 states have (on average 2.6108558144563982) internal successors, (48293), 18497 states have internal predecessors, (48293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18498 states to 18498 states and 48293 transitions. [2021-03-10 21:12:39,719 INFO L78 Accepts]: Start accepts. Automaton has 18498 states and 48293 transitions. Word has length 53 [2021-03-10 21:12:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:39,719 INFO L480 AbstractCegarLoop]: Abstraction has 18498 states and 48293 transitions. [2021-03-10 21:12:39,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 18498 states and 48293 transitions. [2021-03-10 21:12:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:39,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:39,730 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:39,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-03-10 21:12:39,930 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:39,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:39,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1726165017, now seen corresponding path program 91 times [2021-03-10 21:12:39,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:39,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430093723] [2021-03-10 21:12:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:40,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430093723] [2021-03-10 21:12:40,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887130926] [2021-03-10 21:12:40,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:40,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:40,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:40,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:12:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174212988] [2021-03-10 21:12:40,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:12:40,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:12:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:12:40,117 INFO L87 Difference]: Start difference. First operand 18498 states and 48293 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:40,344 INFO L93 Difference]: Finished difference Result 22558 states and 56564 transitions. [2021-03-10 21:12:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:12:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:40,369 INFO L225 Difference]: With dead ends: 22558 [2021-03-10 21:12:40,369 INFO L226 Difference]: Without dead ends: 22558 [2021-03-10 21:12:40,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:12:40,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22558 states. [2021-03-10 21:12:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22558 to 18322. [2021-03-10 21:12:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18322 states, 18321 states have (on average 2.6065716936848426) internal successors, (47755), 18321 states have internal predecessors, (47755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18322 states to 18322 states and 47755 transitions. [2021-03-10 21:12:40,624 INFO L78 Accepts]: Start accepts. Automaton has 18322 states and 47755 transitions. Word has length 53 [2021-03-10 21:12:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:40,624 INFO L480 AbstractCegarLoop]: Abstraction has 18322 states and 47755 transitions. [2021-03-10 21:12:40,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 18322 states and 47755 transitions. [2021-03-10 21:12:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:40,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:40,634 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:40,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-03-10 21:12:40,834 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:40,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1461271213, now seen corresponding path program 162 times [2021-03-10 21:12:40,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:40,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947594554] [2021-03-10 21:12:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:40,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947594554] [2021-03-10 21:12:40,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951465270] [2021-03-10 21:12:40,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:40,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:12:40,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:40,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:40,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:41,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:41,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:12:41,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939903359] [2021-03-10 21:12:41,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:12:41,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:41,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:12:41,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:12:41,015 INFO L87 Difference]: Start difference. First operand 18322 states and 47755 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:41,204 INFO L93 Difference]: Finished difference Result 19963 states and 51076 transitions. [2021-03-10 21:12:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:12:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:41,227 INFO L225 Difference]: With dead ends: 19963 [2021-03-10 21:12:41,228 INFO L226 Difference]: Without dead ends: 19945 [2021-03-10 21:12:41,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:12:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19945 states. [2021-03-10 21:12:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19945 to 18322. [2021-03-10 21:12:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18322 states, 18321 states have (on average 2.606025871950221) internal successors, (47745), 18321 states have internal predecessors, (47745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18322 states to 18322 states and 47745 transitions. [2021-03-10 21:12:41,496 INFO L78 Accepts]: Start accepts. Automaton has 18322 states and 47745 transitions. Word has length 53 [2021-03-10 21:12:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:41,496 INFO L480 AbstractCegarLoop]: Abstraction has 18322 states and 47745 transitions. [2021-03-10 21:12:41,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 18322 states and 47745 transitions. [2021-03-10 21:12:41,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:41,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:41,506 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:41,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-03-10 21:12:41,706 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1403224534, now seen corresponding path program 92 times [2021-03-10 21:12:41,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:41,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218933518] [2021-03-10 21:12:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:41,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218933518] [2021-03-10 21:12:41,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386406977] [2021-03-10 21:12:41,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:41,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:12:41,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:41,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:41,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:41,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:12:41,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592370867] [2021-03-10 21:12:41,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:41,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:41,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:41,906 INFO L87 Difference]: Start difference. First operand 18322 states and 47745 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:42,388 INFO L93 Difference]: Finished difference Result 20315 states and 51884 transitions. [2021-03-10 21:12:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:12:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:42,411 INFO L225 Difference]: With dead ends: 20315 [2021-03-10 21:12:42,411 INFO L226 Difference]: Without dead ends: 20272 [2021-03-10 21:12:42,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20272 states. [2021-03-10 21:12:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20272 to 18608. [2021-03-10 21:12:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18608 states, 18607 states have (on average 2.6038587628311927) internal successors, (48450), 18607 states have internal predecessors, (48450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18608 states to 18608 states and 48450 transitions. [2021-03-10 21:12:42,650 INFO L78 Accepts]: Start accepts. Automaton has 18608 states and 48450 transitions. Word has length 53 [2021-03-10 21:12:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:42,650 INFO L480 AbstractCegarLoop]: Abstraction has 18608 states and 48450 transitions. [2021-03-10 21:12:42,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 18608 states and 48450 transitions. [2021-03-10 21:12:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:42,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:42,660 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:42,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-03-10 21:12:42,861 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:42,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:42,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1338045905, now seen corresponding path program 163 times [2021-03-10 21:12:42,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:42,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693328631] [2021-03-10 21:12:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:42,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693328631] [2021-03-10 21:12:42,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889500367] [2021-03-10 21:12:42,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:12:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:42,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:42,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:43,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:43,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:12:43,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098079187] [2021-03-10 21:12:43,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:12:43,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:43,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:12:43,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:12:43,043 INFO L87 Difference]: Start difference. First operand 18608 states and 48450 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:43,216 INFO L93 Difference]: Finished difference Result 20701 states and 52634 transitions. [2021-03-10 21:12:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:12:43,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:43,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:43,240 INFO L225 Difference]: With dead ends: 20701 [2021-03-10 21:12:43,240 INFO L226 Difference]: Without dead ends: 20698 [2021-03-10 21:12:43,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20698 states. [2021-03-10 21:12:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20698 to 18588. [2021-03-10 21:12:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18588 states, 18587 states have (on average 2.602571689890784) internal successors, (48374), 18587 states have internal predecessors, (48374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18588 states to 18588 states and 48374 transitions. [2021-03-10 21:12:43,511 INFO L78 Accepts]: Start accepts. Automaton has 18588 states and 48374 transitions. Word has length 53 [2021-03-10 21:12:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:43,511 INFO L480 AbstractCegarLoop]: Abstraction has 18588 states and 48374 transitions. [2021-03-10 21:12:43,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 18588 states and 48374 transitions. [2021-03-10 21:12:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:43,521 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:43,521 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:43,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:43,735 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:43,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:43,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1545108471, now seen corresponding path program 164 times [2021-03-10 21:12:43,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:43,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142675238] [2021-03-10 21:12:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:43,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142675238] [2021-03-10 21:12:43,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448395714] [2021-03-10 21:12:43,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:43,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:12:43,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:43,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:43,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:43,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:12:43,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982545484] [2021-03-10 21:12:43,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:43,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:43,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:43,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:43,926 INFO L87 Difference]: Start difference. First operand 18588 states and 48374 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:44,168 INFO L93 Difference]: Finished difference Result 20717 states and 52607 transitions. [2021-03-10 21:12:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:12:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:44,191 INFO L225 Difference]: With dead ends: 20717 [2021-03-10 21:12:44,192 INFO L226 Difference]: Without dead ends: 20699 [2021-03-10 21:12:44,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:12:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20699 states. [2021-03-10 21:12:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20699 to 18588. [2021-03-10 21:12:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18588 states, 18587 states have (on average 2.6012804648410177) internal successors, (48350), 18587 states have internal predecessors, (48350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18588 states to 18588 states and 48350 transitions. [2021-03-10 21:12:44,492 INFO L78 Accepts]: Start accepts. Automaton has 18588 states and 48350 transitions. Word has length 53 [2021-03-10 21:12:44,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:44,492 INFO L480 AbstractCegarLoop]: Abstraction has 18588 states and 48350 transitions. [2021-03-10 21:12:44,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 18588 states and 48350 transitions. [2021-03-10 21:12:44,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:44,502 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:44,502 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:44,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:44,703 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:44,703 INFO L82 PathProgramCache]: Analyzing trace with hash 97108458, now seen corresponding path program 165 times [2021-03-10 21:12:44,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:44,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621417513] [2021-03-10 21:12:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:44,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621417513] [2021-03-10 21:12:44,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743221404] [2021-03-10 21:12:44,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:44,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 21:12:44,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:44,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:44,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:44,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:12:44,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836177873] [2021-03-10 21:12:44,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:44,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:44,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:44,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:44,906 INFO L87 Difference]: Start difference. First operand 18588 states and 48350 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:45,555 INFO L93 Difference]: Finished difference Result 19474 states and 49972 transitions. [2021-03-10 21:12:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:12:45,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:45,577 INFO L225 Difference]: With dead ends: 19474 [2021-03-10 21:12:45,577 INFO L226 Difference]: Without dead ends: 19406 [2021-03-10 21:12:45,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19406 states. [2021-03-10 21:12:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19406 to 18555. [2021-03-10 21:12:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18555 states, 18554 states have (on average 2.5994933707017354) internal successors, (48231), 18554 states have internal predecessors, (48231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18555 states to 18555 states and 48231 transitions. [2021-03-10 21:12:45,810 INFO L78 Accepts]: Start accepts. Automaton has 18555 states and 48231 transitions. Word has length 53 [2021-03-10 21:12:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:45,810 INFO L480 AbstractCegarLoop]: Abstraction has 18555 states and 48231 transitions. [2021-03-10 21:12:45,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 18555 states and 48231 transitions. [2021-03-10 21:12:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:45,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:45,821 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:46,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:46,021 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:46,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash -516427722, now seen corresponding path program 166 times [2021-03-10 21:12:46,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:46,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950134725] [2021-03-10 21:12:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:46,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950134725] [2021-03-10 21:12:46,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230806740] [2021-03-10 21:12:46,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:46,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:12:46,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:46,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:46,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:46,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:46,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:12:46,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864841045] [2021-03-10 21:12:46,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:46,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:46,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:46,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:46,223 INFO L87 Difference]: Start difference. First operand 18555 states and 48231 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:46,687 INFO L93 Difference]: Finished difference Result 19852 states and 50816 transitions. [2021-03-10 21:12:46,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:12:46,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:46,709 INFO L225 Difference]: With dead ends: 19852 [2021-03-10 21:12:46,709 INFO L226 Difference]: Without dead ends: 19804 [2021-03-10 21:12:46,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19804 states. [2021-03-10 21:12:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19804 to 18355. [2021-03-10 21:12:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18355 states, 18354 states have (on average 2.601176855181432) internal successors, (47742), 18354 states have internal predecessors, (47742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18355 states to 18355 states and 47742 transitions. [2021-03-10 21:12:46,943 INFO L78 Accepts]: Start accepts. Automaton has 18355 states and 47742 transitions. Word has length 53 [2021-03-10 21:12:46,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:46,943 INFO L480 AbstractCegarLoop]: Abstraction has 18355 states and 47742 transitions. [2021-03-10 21:12:46,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand 18355 states and 47742 transitions. [2021-03-10 21:12:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:46,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:46,953 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:47,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:47,154 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:47,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:47,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1625489612, now seen corresponding path program 167 times [2021-03-10 21:12:47,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:47,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229669808] [2021-03-10 21:12:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:47,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229669808] [2021-03-10 21:12:47,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466475191] [2021-03-10 21:12:47,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:47,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:12:47,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:47,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:47,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:47,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:47,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:12:47,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822131557] [2021-03-10 21:12:47,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:12:47,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:47,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:12:47,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:12:47,351 INFO L87 Difference]: Start difference. First operand 18355 states and 47742 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:47,928 INFO L93 Difference]: Finished difference Result 20976 states and 53276 transitions. [2021-03-10 21:12:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:12:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:47,951 INFO L225 Difference]: With dead ends: 20976 [2021-03-10 21:12:47,951 INFO L226 Difference]: Without dead ends: 20934 [2021-03-10 21:12:47,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:12:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20934 states. [2021-03-10 21:12:48,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20934 to 18408. [2021-03-10 21:12:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18408 states, 18407 states have (on average 2.6013473135220297) internal successors, (47883), 18407 states have internal predecessors, (47883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18408 states to 18408 states and 47883 transitions. [2021-03-10 21:12:48,226 INFO L78 Accepts]: Start accepts. Automaton has 18408 states and 47883 transitions. Word has length 53 [2021-03-10 21:12:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:48,226 INFO L480 AbstractCegarLoop]: Abstraction has 18408 states and 47883 transitions. [2021-03-10 21:12:48,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 18408 states and 47883 transitions. [2021-03-10 21:12:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:48,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:48,237 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:48,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-03-10 21:12:48,437 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:48,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1136918575, now seen corresponding path program 168 times [2021-03-10 21:12:48,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:48,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075391560] [2021-03-10 21:12:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:12:48,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075391560] [2021-03-10 21:12:48,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576005444] [2021-03-10 21:12:48,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:48,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:12:48,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:48,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:48,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:12:48,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:48,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:12:48,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629590641] [2021-03-10 21:12:48,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:12:48,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:48,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:12:48,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:12:48,628 INFO L87 Difference]: Start difference. First operand 18408 states and 47883 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:48,862 INFO L93 Difference]: Finished difference Result 20776 states and 52686 transitions. [2021-03-10 21:12:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:12:48,863 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:48,887 INFO L225 Difference]: With dead ends: 20776 [2021-03-10 21:12:48,887 INFO L226 Difference]: Without dead ends: 20752 [2021-03-10 21:12:48,887 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:12:48,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20752 states. [2021-03-10 21:12:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20752 to 18041. [2021-03-10 21:12:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18041 states, 18040 states have (on average 2.5951219512195123) internal successors, (46816), 18040 states have internal predecessors, (46816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18041 states to 18041 states and 46816 transitions. [2021-03-10 21:12:49,127 INFO L78 Accepts]: Start accepts. Automaton has 18041 states and 46816 transitions. Word has length 53 [2021-03-10 21:12:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:49,127 INFO L480 AbstractCegarLoop]: Abstraction has 18041 states and 46816 transitions. [2021-03-10 21:12:49,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 18041 states and 46816 transitions. [2021-03-10 21:12:49,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:49,137 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:49,137 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:49,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-03-10 21:12:49,337 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:49,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1780326146, now seen corresponding path program 169 times [2021-03-10 21:12:49,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:49,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490992650] [2021-03-10 21:12:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:49,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490992650] [2021-03-10 21:12:49,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040983583] [2021-03-10 21:12:49,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:49,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:49,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:49,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:49,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:12:49,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336610610] [2021-03-10 21:12:49,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:12:49,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:12:49,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:12:49,542 INFO L87 Difference]: Start difference. First operand 18041 states and 46816 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:50,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:50,146 INFO L93 Difference]: Finished difference Result 21002 states and 53015 transitions. [2021-03-10 21:12:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:12:50,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:50,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:50,170 INFO L225 Difference]: With dead ends: 21002 [2021-03-10 21:12:50,170 INFO L226 Difference]: Without dead ends: 20948 [2021-03-10 21:12:50,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:12:50,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20948 states. [2021-03-10 21:12:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20948 to 18011. [2021-03-10 21:12:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18011 states, 18010 states have (on average 2.593225985563576) internal successors, (46704), 18010 states have internal predecessors, (46704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18011 states to 18011 states and 46704 transitions. [2021-03-10 21:12:50,404 INFO L78 Accepts]: Start accepts. Automaton has 18011 states and 46704 transitions. Word has length 53 [2021-03-10 21:12:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:50,404 INFO L480 AbstractCegarLoop]: Abstraction has 18011 states and 46704 transitions. [2021-03-10 21:12:50,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 18011 states and 46704 transitions. [2021-03-10 21:12:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:50,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:50,414 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:50,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-03-10 21:12:50,614 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:50,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:50,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1542264629, now seen corresponding path program 93 times [2021-03-10 21:12:50,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:50,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680763427] [2021-03-10 21:12:50,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:50,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680763427] [2021-03-10 21:12:50,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22521303] [2021-03-10 21:12:50,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:50,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 21:12:50,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:50,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:50,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:50,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:50,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:12:50,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129842904] [2021-03-10 21:12:50,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:12:50,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:50,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:12:50,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:12:50,789 INFO L87 Difference]: Start difference. First operand 18011 states and 46704 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:51,014 INFO L93 Difference]: Finished difference Result 21439 states and 53755 transitions. [2021-03-10 21:12:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:12:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:51,038 INFO L225 Difference]: With dead ends: 21439 [2021-03-10 21:12:51,038 INFO L226 Difference]: Without dead ends: 21425 [2021-03-10 21:12:51,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:12:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21425 states. [2021-03-10 21:12:51,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21425 to 18294. [2021-03-10 21:12:51,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18294 states, 18293 states have (on average 2.597824304378724) internal successors, (47522), 18293 states have internal predecessors, (47522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18294 states to 18294 states and 47522 transitions. [2021-03-10 21:12:51,361 INFO L78 Accepts]: Start accepts. Automaton has 18294 states and 47522 transitions. Word has length 53 [2021-03-10 21:12:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:51,362 INFO L480 AbstractCegarLoop]: Abstraction has 18294 states and 47522 transitions. [2021-03-10 21:12:51,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 18294 states and 47522 transitions. [2021-03-10 21:12:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:51,371 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:51,371 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:51,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:51,572 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:51,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:51,572 INFO L82 PathProgramCache]: Analyzing trace with hash 920384219, now seen corresponding path program 94 times [2021-03-10 21:12:51,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:51,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193168574] [2021-03-10 21:12:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:12:51,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193168574] [2021-03-10 21:12:51,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894278559] [2021-03-10 21:12:51,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:51,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:12:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:51,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:51,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:51,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:51,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:12:51,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324369003] [2021-03-10 21:12:51,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:12:51,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:51,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:12:51,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:12:51,750 INFO L87 Difference]: Start difference. First operand 18294 states and 47522 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:51,991 INFO L93 Difference]: Finished difference Result 24998 states and 62195 transitions. [2021-03-10 21:12:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:12:51,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:52,021 INFO L225 Difference]: With dead ends: 24998 [2021-03-10 21:12:52,022 INFO L226 Difference]: Without dead ends: 24998 [2021-03-10 21:12:52,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:12:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24998 states. [2021-03-10 21:12:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24998 to 18308. [2021-03-10 21:12:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18308 states, 18307 states have (on average 2.5978587425574915) internal successors, (47559), 18307 states have internal predecessors, (47559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18308 states to 18308 states and 47559 transitions. [2021-03-10 21:12:52,288 INFO L78 Accepts]: Start accepts. Automaton has 18308 states and 47559 transitions. Word has length 53 [2021-03-10 21:12:52,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:52,288 INFO L480 AbstractCegarLoop]: Abstraction has 18308 states and 47559 transitions. [2021-03-10 21:12:52,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:52,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18308 states and 47559 transitions. [2021-03-10 21:12:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:52,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:52,298 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:52,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:52,498 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:52,499 INFO L82 PathProgramCache]: Analyzing trace with hash -717188237, now seen corresponding path program 95 times [2021-03-10 21:12:52,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:52,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543742740] [2021-03-10 21:12:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 94 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:12:52,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543742740] [2021-03-10 21:12:52,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561506004] [2021-03-10 21:12:52,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:52,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:12:52,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:52,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:52,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 96 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:52,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:52,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-03-10 21:12:52,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100927047] [2021-03-10 21:12:52,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:12:52,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:12:52,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:12:52,752 INFO L87 Difference]: Start difference. First operand 18308 states and 47559 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:53,193 INFO L93 Difference]: Finished difference Result 25404 states and 63122 transitions. [2021-03-10 21:12:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:12:53,194 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:53,223 INFO L225 Difference]: With dead ends: 25404 [2021-03-10 21:12:53,223 INFO L226 Difference]: Without dead ends: 25404 [2021-03-10 21:12:53,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=257, Invalid=445, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:12:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25404 states. [2021-03-10 21:12:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25404 to 18331. [2021-03-10 21:12:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18331 states, 18330 states have (on average 2.5983633387888707) internal successors, (47628), 18330 states have internal predecessors, (47628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18331 states to 18331 states and 47628 transitions. [2021-03-10 21:12:53,491 INFO L78 Accepts]: Start accepts. Automaton has 18331 states and 47628 transitions. Word has length 53 [2021-03-10 21:12:53,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:53,491 INFO L480 AbstractCegarLoop]: Abstraction has 18331 states and 47628 transitions. [2021-03-10 21:12:53,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:53,492 INFO L276 IsEmpty]: Start isEmpty. Operand 18331 states and 47628 transitions. [2021-03-10 21:12:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:53,501 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:53,501 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:53,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:53,701 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1887783895, now seen corresponding path program 96 times [2021-03-10 21:12:53,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:53,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172627470] [2021-03-10 21:12:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:53,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172627470] [2021-03-10 21:12:53,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114242459] [2021-03-10 21:12:53,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:53,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 21:12:53,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:53,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:12:53,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:53,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:53,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 16 [2021-03-10 21:12:53,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100176247] [2021-03-10 21:12:53,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:12:53,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:53,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:12:53,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:53,938 INFO L87 Difference]: Start difference. First operand 18331 states and 47628 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:54,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:54,277 INFO L93 Difference]: Finished difference Result 22236 states and 55674 transitions. [2021-03-10 21:12:54,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:12:54,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:54,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:54,303 INFO L225 Difference]: With dead ends: 22236 [2021-03-10 21:12:54,303 INFO L226 Difference]: Without dead ends: 22236 [2021-03-10 21:12:54,304 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:12:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22236 states. [2021-03-10 21:12:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22236 to 18084. [2021-03-10 21:12:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18084 states, 18083 states have (on average 2.594038599789858) internal successors, (46908), 18083 states have internal predecessors, (46908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18084 states to 18084 states and 46908 transitions. [2021-03-10 21:12:54,608 INFO L78 Accepts]: Start accepts. Automaton has 18084 states and 46908 transitions. Word has length 53 [2021-03-10 21:12:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:54,608 INFO L480 AbstractCegarLoop]: Abstraction has 18084 states and 46908 transitions. [2021-03-10 21:12:54,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 18084 states and 46908 transitions. [2021-03-10 21:12:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:54,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:54,618 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:54,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-03-10 21:12:54,818 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:54,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2128038473, now seen corresponding path program 170 times [2021-03-10 21:12:54,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:54,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115329008] [2021-03-10 21:12:54,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:54,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115329008] [2021-03-10 21:12:54,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312363044] [2021-03-10 21:12:54,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:54,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:12:54,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:54,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:55,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:55,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:12:55,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424645470] [2021-03-10 21:12:55,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:12:55,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:55,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:12:55,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:12:55,008 INFO L87 Difference]: Start difference. First operand 18084 states and 46908 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:55,238 INFO L93 Difference]: Finished difference Result 20228 states and 51314 transitions. [2021-03-10 21:12:55,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:12:55,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:55,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:55,260 INFO L225 Difference]: With dead ends: 20228 [2021-03-10 21:12:55,260 INFO L226 Difference]: Without dead ends: 20201 [2021-03-10 21:12:55,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20201 states. [2021-03-10 21:12:55,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20201 to 18084. [2021-03-10 21:12:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18084 states, 18083 states have (on average 2.593540894763037) internal successors, (46899), 18083 states have internal predecessors, (46899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18084 states to 18084 states and 46899 transitions. [2021-03-10 21:12:55,493 INFO L78 Accepts]: Start accepts. Automaton has 18084 states and 46899 transitions. Word has length 53 [2021-03-10 21:12:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:55,493 INFO L480 AbstractCegarLoop]: Abstraction has 18084 states and 46899 transitions. [2021-03-10 21:12:55,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 18084 states and 46899 transitions. [2021-03-10 21:12:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:55,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:55,503 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:55,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-03-10 21:12:55,703 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:55,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:55,703 INFO L82 PathProgramCache]: Analyzing trace with hash 63471187, now seen corresponding path program 171 times [2021-03-10 21:12:55,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:55,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044064099] [2021-03-10 21:12:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:55,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044064099] [2021-03-10 21:12:55,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177671169] [2021-03-10 21:12:55,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:55,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-03-10 21:12:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:55,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:55,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:55,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:12:55,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325602121] [2021-03-10 21:12:55,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:12:55,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:12:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:12:55,875 INFO L87 Difference]: Start difference. First operand 18084 states and 46899 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:56,093 INFO L93 Difference]: Finished difference Result 25377 states and 63889 transitions. [2021-03-10 21:12:56,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:12:56,093 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:56,122 INFO L225 Difference]: With dead ends: 25377 [2021-03-10 21:12:56,122 INFO L226 Difference]: Without dead ends: 25377 [2021-03-10 21:12:56,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:12:56,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25377 states. [2021-03-10 21:12:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25377 to 18345. [2021-03-10 21:12:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18345 states, 18344 states have (on average 2.6009049280418663) internal successors, (47711), 18344 states have internal predecessors, (47711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:56,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18345 states to 18345 states and 47711 transitions. [2021-03-10 21:12:56,396 INFO L78 Accepts]: Start accepts. Automaton has 18345 states and 47711 transitions. Word has length 53 [2021-03-10 21:12:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:56,396 INFO L480 AbstractCegarLoop]: Abstraction has 18345 states and 47711 transitions. [2021-03-10 21:12:56,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:56,396 INFO L276 IsEmpty]: Start isEmpty. Operand 18345 states and 47711 transitions. [2021-03-10 21:12:56,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:56,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:56,406 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:56,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:56,606 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:56,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:56,606 INFO L82 PathProgramCache]: Analyzing trace with hash -174590330, now seen corresponding path program 97 times [2021-03-10 21:12:56,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:56,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813200161] [2021-03-10 21:12:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:56,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813200161] [2021-03-10 21:12:56,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488280519] [2021-03-10 21:12:56,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:56,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:56,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:56,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:56,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:12:56,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709294395] [2021-03-10 21:12:56,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:56,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:56,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:56,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:56,801 INFO L87 Difference]: Start difference. First operand 18345 states and 47711 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:57,259 INFO L93 Difference]: Finished difference Result 20068 states and 51285 transitions. [2021-03-10 21:12:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:12:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:57,281 INFO L225 Difference]: With dead ends: 20068 [2021-03-10 21:12:57,281 INFO L226 Difference]: Without dead ends: 20033 [2021-03-10 21:12:57,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:12:57,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20033 states. [2021-03-10 21:12:57,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20033 to 18594. [2021-03-10 21:12:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18594 states, 18593 states have (on average 2.5987199483676653) internal successors, (48318), 18593 states have internal predecessors, (48318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18594 states to 18594 states and 48318 transitions. [2021-03-10 21:12:57,520 INFO L78 Accepts]: Start accepts. Automaton has 18594 states and 48318 transitions. Word has length 53 [2021-03-10 21:12:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:57,520 INFO L480 AbstractCegarLoop]: Abstraction has 18594 states and 48318 transitions. [2021-03-10 21:12:57,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:57,520 INFO L276 IsEmpty]: Start isEmpty. Operand 18594 states and 48318 transitions. [2021-03-10 21:12:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:57,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:57,530 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:57,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:57,730 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:57,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:57,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1728287187, now seen corresponding path program 172 times [2021-03-10 21:12:57,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:57,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022959006] [2021-03-10 21:12:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:57,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022959006] [2021-03-10 21:12:57,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93793779] [2021-03-10 21:12:57,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:57,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:12:57,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:57,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:57,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:57,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:57,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:12:57,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429584777] [2021-03-10 21:12:57,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:12:57,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:57,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:12:57,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:12:57,960 INFO L87 Difference]: Start difference. First operand 18594 states and 48318 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:58,150 INFO L93 Difference]: Finished difference Result 21173 states and 53581 transitions. [2021-03-10 21:12:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:12:58,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:58,174 INFO L225 Difference]: With dead ends: 21173 [2021-03-10 21:12:58,174 INFO L226 Difference]: Without dead ends: 21164 [2021-03-10 21:12:58,174 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:12:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21164 states. [2021-03-10 21:12:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21164 to 18576. [2021-03-10 21:12:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18576 states, 18575 states have (on average 2.5972543741588154) internal successors, (48244), 18575 states have internal predecessors, (48244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18576 states to 18576 states and 48244 transitions. [2021-03-10 21:12:58,417 INFO L78 Accepts]: Start accepts. Automaton has 18576 states and 48244 transitions. Word has length 53 [2021-03-10 21:12:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:58,418 INFO L480 AbstractCegarLoop]: Abstraction has 18576 states and 48244 transitions. [2021-03-10 21:12:58,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 18576 states and 48244 transitions. [2021-03-10 21:12:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:58,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:58,428 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:58,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-03-10 21:12:58,628 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:58,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1521224621, now seen corresponding path program 173 times [2021-03-10 21:12:58,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:58,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267575411] [2021-03-10 21:12:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:12:58,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267575411] [2021-03-10 21:12:58,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048958771] [2021-03-10 21:12:58,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:58,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:12:58,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:58,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:12:58,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:58,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:58,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 14 [2021-03-10 21:12:58,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574925000] [2021-03-10 21:12:58,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:12:58,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:58,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:12:58,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:12:58,820 INFO L87 Difference]: Start difference. First operand 18576 states and 48244 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:59,090 INFO L93 Difference]: Finished difference Result 21383 states and 53981 transitions. [2021-03-10 21:12:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:12:59,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:12:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:59,114 INFO L225 Difference]: With dead ends: 21383 [2021-03-10 21:12:59,114 INFO L226 Difference]: Without dead ends: 21365 [2021-03-10 21:12:59,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:12:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21365 states. [2021-03-10 21:12:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21365 to 18576. [2021-03-10 21:12:59,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18576 states, 18575 states have (on average 2.5959623149394346) internal successors, (48220), 18575 states have internal predecessors, (48220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18576 states to 18576 states and 48220 transitions. [2021-03-10 21:12:59,362 INFO L78 Accepts]: Start accepts. Automaton has 18576 states and 48220 transitions. Word has length 53 [2021-03-10 21:12:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:59,363 INFO L480 AbstractCegarLoop]: Abstraction has 18576 states and 48220 transitions. [2021-03-10 21:12:59,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:59,363 INFO L276 IsEmpty]: Start isEmpty. Operand 18576 states and 48220 transitions. [2021-03-10 21:12:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:12:59,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:59,373 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:59,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:59,573 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:59,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1325742662, now seen corresponding path program 174 times [2021-03-10 21:12:59,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:59,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476547603] [2021-03-10 21:12:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:59,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476547603] [2021-03-10 21:12:59,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78493910] [2021-03-10 21:12:59,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:59,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-03-10 21:12:59,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:59,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:12:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:12:59,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:59,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:12:59,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091625133] [2021-03-10 21:12:59,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:12:59,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:59,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:12:59,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:12:59,778 INFO L87 Difference]: Start difference. First operand 18576 states and 48220 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:00,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:00,457 INFO L93 Difference]: Finished difference Result 19388 states and 49713 transitions. [2021-03-10 21:13:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:00,458 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:00,482 INFO L225 Difference]: With dead ends: 19388 [2021-03-10 21:13:00,482 INFO L226 Difference]: Without dead ends: 19312 [2021-03-10 21:13:00,482 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19312 states. [2021-03-10 21:13:00,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19312 to 18549. [2021-03-10 21:13:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18549 states, 18548 states have (on average 2.593487168427863) internal successors, (48104), 18548 states have internal predecessors, (48104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18549 states to 18549 states and 48104 transitions. [2021-03-10 21:13:00,749 INFO L78 Accepts]: Start accepts. Automaton has 18549 states and 48104 transitions. Word has length 53 [2021-03-10 21:13:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:00,749 INFO L480 AbstractCegarLoop]: Abstraction has 18549 states and 48104 transitions. [2021-03-10 21:13:00,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 18549 states and 48104 transitions. [2021-03-10 21:13:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:00,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:00,759 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:00,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-03-10 21:13:00,975 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash 712206482, now seen corresponding path program 175 times [2021-03-10 21:13:00,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:00,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302467350] [2021-03-10 21:13:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302467350] [2021-03-10 21:13:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075940042] [2021-03-10 21:13:01,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:01,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:01,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:01,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:01,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:13:01,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984718271] [2021-03-10 21:13:01,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:01,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:01,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:01,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:01,280 INFO L87 Difference]: Start difference. First operand 18549 states and 48104 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:01,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:01,739 INFO L93 Difference]: Finished difference Result 19838 states and 50709 transitions. [2021-03-10 21:13:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:01,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:01,763 INFO L225 Difference]: With dead ends: 19838 [2021-03-10 21:13:01,763 INFO L226 Difference]: Without dead ends: 19793 [2021-03-10 21:13:01,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:01,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19793 states. [2021-03-10 21:13:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19793 to 18538. [2021-03-10 21:13:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18538 states, 18537 states have (on average 2.5935156713599827) internal successors, (48076), 18537 states have internal predecessors, (48076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18538 states to 18538 states and 48076 transitions. [2021-03-10 21:13:02,003 INFO L78 Accepts]: Start accepts. Automaton has 18538 states and 48076 transitions. Word has length 53 [2021-03-10 21:13:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:02,003 INFO L480 AbstractCegarLoop]: Abstraction has 18538 states and 48076 transitions. [2021-03-10 21:13:02,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 18538 states and 48076 transitions. [2021-03-10 21:13:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:02,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:02,013 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:02,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:02,214 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:02,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:02,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1440843480, now seen corresponding path program 176 times [2021-03-10 21:13:02,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:02,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461531151] [2021-03-10 21:13:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:02,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461531151] [2021-03-10 21:13:02,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303422626] [2021-03-10 21:13:02,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:02,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:02,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:02,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:02,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:02,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:02,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:13:02,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998440747] [2021-03-10 21:13:02,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:02,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:02,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:02,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:02,408 INFO L87 Difference]: Start difference. First operand 18538 states and 48076 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:03,017 INFO L93 Difference]: Finished difference Result 21341 states and 54040 transitions. [2021-03-10 21:13:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:13:03,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:03,041 INFO L225 Difference]: With dead ends: 21341 [2021-03-10 21:13:03,041 INFO L226 Difference]: Without dead ends: 21287 [2021-03-10 21:13:03,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:13:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21287 states. [2021-03-10 21:13:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21287 to 18695. [2021-03-10 21:13:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18695 states, 18694 states have (on average 2.594201348026105) internal successors, (48496), 18694 states have internal predecessors, (48496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18695 states to 18695 states and 48496 transitions. [2021-03-10 21:13:03,283 INFO L78 Accepts]: Start accepts. Automaton has 18695 states and 48496 transitions. Word has length 53 [2021-03-10 21:13:03,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:03,283 INFO L480 AbstractCegarLoop]: Abstraction has 18695 states and 48496 transitions. [2021-03-10 21:13:03,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 18695 states and 48496 transitions. [2021-03-10 21:13:03,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:03,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:03,293 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:03,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable637 [2021-03-10 21:13:03,493 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:03,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:03,493 INFO L82 PathProgramCache]: Analyzing trace with hash 91715629, now seen corresponding path program 177 times [2021-03-10 21:13:03,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:03,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920099490] [2021-03-10 21:13:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:03,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920099490] [2021-03-10 21:13:03,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553963900] [2021-03-10 21:13:03,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:03,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:13:03,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:03,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:03,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:13:03,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016019187] [2021-03-10 21:13:03,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:03,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:03,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:03,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:03,707 INFO L87 Difference]: Start difference. First operand 18695 states and 48496 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:03,982 INFO L93 Difference]: Finished difference Result 21411 states and 54036 transitions. [2021-03-10 21:13:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:13:03,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:04,005 INFO L225 Difference]: With dead ends: 21411 [2021-03-10 21:13:04,005 INFO L226 Difference]: Without dead ends: 21387 [2021-03-10 21:13:04,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21387 states. [2021-03-10 21:13:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21387 to 18695. [2021-03-10 21:13:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18695 states, 18694 states have (on average 2.5932919653364714) internal successors, (48479), 18694 states have internal predecessors, (48479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18695 states to 18695 states and 48479 transitions. [2021-03-10 21:13:04,247 INFO L78 Accepts]: Start accepts. Automaton has 18695 states and 48479 transitions. Word has length 53 [2021-03-10 21:13:04,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:04,247 INFO L480 AbstractCegarLoop]: Abstraction has 18695 states and 48479 transitions. [2021-03-10 21:13:04,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:04,247 INFO L276 IsEmpty]: Start isEmpty. Operand 18695 states and 48479 transitions. [2021-03-10 21:13:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:04,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:04,257 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:04,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:04,457 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:04,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1286006946, now seen corresponding path program 178 times [2021-03-10 21:13:04,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:04,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818754792] [2021-03-10 21:13:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:04,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818754792] [2021-03-10 21:13:04,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145419027] [2021-03-10 21:13:04,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:04,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:04,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:04,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:04,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:04,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:04,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:13:04,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18522783] [2021-03-10 21:13:04,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:04,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:04,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:04,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:04,733 INFO L87 Difference]: Start difference. First operand 18695 states and 48479 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:05,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:05,529 INFO L93 Difference]: Finished difference Result 23725 states and 59400 transitions. [2021-03-10 21:13:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:13:05,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:05,555 INFO L225 Difference]: With dead ends: 23725 [2021-03-10 21:13:05,555 INFO L226 Difference]: Without dead ends: 23611 [2021-03-10 21:13:05,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:13:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23611 states. [2021-03-10 21:13:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23611 to 18825. [2021-03-10 21:13:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18825 states, 18824 states have (on average 2.594294517637059) internal successors, (48835), 18824 states have internal predecessors, (48835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18825 states to 18825 states and 48835 transitions. [2021-03-10 21:13:05,810 INFO L78 Accepts]: Start accepts. Automaton has 18825 states and 48835 transitions. Word has length 53 [2021-03-10 21:13:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:05,810 INFO L480 AbstractCegarLoop]: Abstraction has 18825 states and 48835 transitions. [2021-03-10 21:13:05,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18825 states and 48835 transitions. [2021-03-10 21:13:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:05,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:05,820 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:06,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-03-10 21:13:06,021 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:06,021 INFO L82 PathProgramCache]: Analyzing trace with hash -899404269, now seen corresponding path program 179 times [2021-03-10 21:13:06,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:06,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233048920] [2021-03-10 21:13:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:06,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233048920] [2021-03-10 21:13:06,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898656471] [2021-03-10 21:13:06,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:06,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:13:06,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:06,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:06,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:06,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:06,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 16 [2021-03-10 21:13:06,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285061633] [2021-03-10 21:13:06,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:13:06,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:06,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:13:06,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:06,238 INFO L87 Difference]: Start difference. First operand 18825 states and 48835 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:06,564 INFO L93 Difference]: Finished difference Result 21758 states and 54832 transitions. [2021-03-10 21:13:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:13:06,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:06,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:06,588 INFO L225 Difference]: With dead ends: 21758 [2021-03-10 21:13:06,589 INFO L226 Difference]: Without dead ends: 21725 [2021-03-10 21:13:06,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:13:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21725 states. [2021-03-10 21:13:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21725 to 18825. [2021-03-10 21:13:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18825 states, 18824 states have (on average 2.593816404589885) internal successors, (48826), 18824 states have internal predecessors, (48826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18825 states to 18825 states and 48826 transitions. [2021-03-10 21:13:06,844 INFO L78 Accepts]: Start accepts. Automaton has 18825 states and 48826 transitions. Word has length 53 [2021-03-10 21:13:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:06,844 INFO L480 AbstractCegarLoop]: Abstraction has 18825 states and 48826 transitions. [2021-03-10 21:13:06,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 18825 states and 48826 transitions. [2021-03-10 21:13:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:06,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:06,854 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:07,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-03-10 21:13:07,054 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:07,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1345698456, now seen corresponding path program 180 times [2021-03-10 21:13:07,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:07,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827728119] [2021-03-10 21:13:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:07,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827728119] [2021-03-10 21:13:07,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560746866] [2021-03-10 21:13:07,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:07,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-03-10 21:13:07,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:07,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:07,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:13:07,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091524675] [2021-03-10 21:13:07,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:13:07,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:07,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:13:07,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:07,270 INFO L87 Difference]: Start difference. First operand 18825 states and 48826 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:07,931 INFO L93 Difference]: Finished difference Result 22765 states and 57071 transitions. [2021-03-10 21:13:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:13:07,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:07,956 INFO L225 Difference]: With dead ends: 22765 [2021-03-10 21:13:07,956 INFO L226 Difference]: Without dead ends: 22609 [2021-03-10 21:13:07,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:13:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22609 states. [2021-03-10 21:13:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22609 to 18519. [2021-03-10 21:13:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18519 states, 18518 states have (on average 2.588940490333729) internal successors, (47942), 18518 states have internal predecessors, (47942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18519 states to 18519 states and 47942 transitions. [2021-03-10 21:13:08,240 INFO L78 Accepts]: Start accepts. Automaton has 18519 states and 47942 transitions. Word has length 53 [2021-03-10 21:13:08,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:08,241 INFO L480 AbstractCegarLoop]: Abstraction has 18519 states and 47942 transitions. [2021-03-10 21:13:08,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 18519 states and 47942 transitions. [2021-03-10 21:13:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:08,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:08,250 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:08,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:08,451 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:08,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:08,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1583759973, now seen corresponding path program 98 times [2021-03-10 21:13:08,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:08,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282726231] [2021-03-10 21:13:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:08,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282726231] [2021-03-10 21:13:08,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635714669] [2021-03-10 21:13:08,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:08,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:08,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:08,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:08,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:08,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:08,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:13:08,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720026306] [2021-03-10 21:13:08,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:08,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:08,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:08,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:08,624 INFO L87 Difference]: Start difference. First operand 18519 states and 47942 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:08,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:08,865 INFO L93 Difference]: Finished difference Result 21678 states and 54462 transitions. [2021-03-10 21:13:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:13:08,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:08,890 INFO L225 Difference]: With dead ends: 21678 [2021-03-10 21:13:08,890 INFO L226 Difference]: Without dead ends: 21664 [2021-03-10 21:13:08,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21664 states. [2021-03-10 21:13:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21664 to 18888. [2021-03-10 21:13:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18888 states, 18887 states have (on average 2.5939005665272408) internal successors, (48991), 18887 states have internal predecessors, (48991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18888 states to 18888 states and 48991 transitions. [2021-03-10 21:13:09,142 INFO L78 Accepts]: Start accepts. Automaton has 18888 states and 48991 transitions. Word has length 53 [2021-03-10 21:13:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:09,142 INFO L480 AbstractCegarLoop]: Abstraction has 18888 states and 48991 transitions. [2021-03-10 21:13:09,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 18888 states and 48991 transitions. [2021-03-10 21:13:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:09,153 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:09,153 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:09,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-03-10 21:13:09,353 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:09,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2089326913, now seen corresponding path program 99 times [2021-03-10 21:13:09,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:09,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337307062] [2021-03-10 21:13:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337307062] [2021-03-10 21:13:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959100161] [2021-03-10 21:13:09,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:09,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-03-10 21:13:09,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:09,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:13:09,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 109 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:09,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:09,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-03-10 21:13:09,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743143392] [2021-03-10 21:13:09,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:09,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:09,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:09,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:09,543 INFO L87 Difference]: Start difference. First operand 18888 states and 48991 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:09,897 INFO L93 Difference]: Finished difference Result 22429 states and 56253 transitions. [2021-03-10 21:13:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:09,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:09,923 INFO L225 Difference]: With dead ends: 22429 [2021-03-10 21:13:09,923 INFO L226 Difference]: Without dead ends: 22429 [2021-03-10 21:13:09,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22429 states. [2021-03-10 21:13:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22429 to 18495. [2021-03-10 21:13:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18495 states, 18494 states have (on average 2.589650697523521) internal successors, (47893), 18494 states have internal predecessors, (47893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18495 states to 18495 states and 47893 transitions. [2021-03-10 21:13:10,183 INFO L78 Accepts]: Start accepts. Automaton has 18495 states and 47893 transitions. Word has length 53 [2021-03-10 21:13:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:10,183 INFO L480 AbstractCegarLoop]: Abstraction has 18495 states and 47893 transitions. [2021-03-10 21:13:10,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 18495 states and 47893 transitions. [2021-03-10 21:13:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:10,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:10,193 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:10,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-03-10 21:13:10,393 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:10,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:10,394 INFO L82 PathProgramCache]: Analyzing trace with hash 547874413, now seen corresponding path program 181 times [2021-03-10 21:13:10,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:10,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925641207] [2021-03-10 21:13:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:10,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925641207] [2021-03-10 21:13:10,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476140439] [2021-03-10 21:13:10,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:10,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:10,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:10,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:10,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:13:10,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188999551] [2021-03-10 21:13:10,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:13:10,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:10,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:13:10,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:10,596 INFO L87 Difference]: Start difference. First operand 18495 states and 47893 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:10,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:10,871 INFO L93 Difference]: Finished difference Result 20941 states and 52943 transitions. [2021-03-10 21:13:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:13:10,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:10,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:10,894 INFO L225 Difference]: With dead ends: 20941 [2021-03-10 21:13:10,894 INFO L226 Difference]: Without dead ends: 20905 [2021-03-10 21:13:10,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:13:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2021-03-10 21:13:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 18495. [2021-03-10 21:13:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18495 states, 18494 states have (on average 2.5891640532064453) internal successors, (47884), 18494 states have internal predecessors, (47884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18495 states to 18495 states and 47884 transitions. [2021-03-10 21:13:11,223 INFO L78 Accepts]: Start accepts. Automaton has 18495 states and 47884 transitions. Word has length 53 [2021-03-10 21:13:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:11,223 INFO L480 AbstractCegarLoop]: Abstraction has 18495 states and 47884 transitions. [2021-03-10 21:13:11,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 18495 states and 47884 transitions. [2021-03-10 21:13:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:11,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:11,232 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:11,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-03-10 21:13:11,433 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash 355684522, now seen corresponding path program 100 times [2021-03-10 21:13:11,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:11,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320936487] [2021-03-10 21:13:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:11,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320936487] [2021-03-10 21:13:11,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828612785] [2021-03-10 21:13:11,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:11,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:11,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:11,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:11,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:11,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:11,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:13:11,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695887779] [2021-03-10 21:13:11,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:11,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:11,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:11,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:11,640 INFO L87 Difference]: Start difference. First operand 18495 states and 47884 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:12,127 INFO L93 Difference]: Finished difference Result 20077 states and 51155 transitions. [2021-03-10 21:13:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:12,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:12,149 INFO L225 Difference]: With dead ends: 20077 [2021-03-10 21:13:12,149 INFO L226 Difference]: Without dead ends: 20052 [2021-03-10 21:13:12,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:12,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20052 states. [2021-03-10 21:13:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20052 to 18718. [2021-03-10 21:13:12,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18718 states, 18717 states have (on average 2.5876475930971843) internal successors, (48433), 18717 states have internal predecessors, (48433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18718 states to 18718 states and 48433 transitions. [2021-03-10 21:13:12,386 INFO L78 Accepts]: Start accepts. Automaton has 18718 states and 48433 transitions. Word has length 53 [2021-03-10 21:13:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:12,387 INFO L480 AbstractCegarLoop]: Abstraction has 18718 states and 48433 transitions. [2021-03-10 21:13:12,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 18718 states and 48433 transitions. [2021-03-10 21:13:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:12,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:12,397 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:12,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:12,597 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:12,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1198012335, now seen corresponding path program 182 times [2021-03-10 21:13:12,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:12,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734085896] [2021-03-10 21:13:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:12,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734085896] [2021-03-10 21:13:12,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13423989] [2021-03-10 21:13:12,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:12,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:12,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:12,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:12,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:12,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:13:12,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335239981] [2021-03-10 21:13:12,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:12,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:12,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:12,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:12,803 INFO L87 Difference]: Start difference. First operand 18718 states and 48433 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:12,997 INFO L93 Difference]: Finished difference Result 21478 states and 54134 transitions. [2021-03-10 21:13:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:13:12,998 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:13,023 INFO L225 Difference]: With dead ends: 21478 [2021-03-10 21:13:13,023 INFO L226 Difference]: Without dead ends: 21475 [2021-03-10 21:13:13,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21475 states. [2021-03-10 21:13:13,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21475 to 18710. [2021-03-10 21:13:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18710 states, 18709 states have (on average 2.5868298679779786) internal successors, (48397), 18709 states have internal predecessors, (48397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18710 states to 18710 states and 48397 transitions. [2021-03-10 21:13:13,298 INFO L78 Accepts]: Start accepts. Automaton has 18710 states and 48397 transitions. Word has length 53 [2021-03-10 21:13:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:13,298 INFO L480 AbstractCegarLoop]: Abstraction has 18710 states and 48397 transitions. [2021-03-10 21:13:13,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 18710 states and 48397 transitions. [2021-03-10 21:13:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:13,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:13,309 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:13,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:13,510 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash -990949769, now seen corresponding path program 183 times [2021-03-10 21:13:13,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:13,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100109173] [2021-03-10 21:13:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:13,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100109173] [2021-03-10 21:13:13,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259582966] [2021-03-10 21:13:13,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:13,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 21:13:13,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:13,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:13,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:13,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:13:13,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89087703] [2021-03-10 21:13:13,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:13,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:13,687 INFO L87 Difference]: Start difference. First operand 18710 states and 48397 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:13,906 INFO L93 Difference]: Finished difference Result 21506 states and 54147 transitions. [2021-03-10 21:13:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:13:13,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:13,933 INFO L225 Difference]: With dead ends: 21506 [2021-03-10 21:13:13,933 INFO L226 Difference]: Without dead ends: 21488 [2021-03-10 21:13:13,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21488 states. [2021-03-10 21:13:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21488 to 18710. [2021-03-10 21:13:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18710 states, 18709 states have (on average 2.5855470629108983) internal successors, (48373), 18709 states have internal predecessors, (48373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18710 states to 18710 states and 48373 transitions. [2021-03-10 21:13:14,187 INFO L78 Accepts]: Start accepts. Automaton has 18710 states and 48373 transitions. Word has length 53 [2021-03-10 21:13:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:14,187 INFO L480 AbstractCegarLoop]: Abstraction has 18710 states and 48373 transitions. [2021-03-10 21:13:14,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 18710 states and 48373 transitions. [2021-03-10 21:13:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:14,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:14,197 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:14,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-03-10 21:13:14,402 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1856017514, now seen corresponding path program 184 times [2021-03-10 21:13:14,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:14,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015038909] [2021-03-10 21:13:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:14,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015038909] [2021-03-10 21:13:14,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699654728] [2021-03-10 21:13:14,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:14,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:14,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:14,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:14,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:14,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:13:14,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317892883] [2021-03-10 21:13:14,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:14,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:14,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:14,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:14,683 INFO L87 Difference]: Start difference. First operand 18710 states and 48373 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:15,370 INFO L93 Difference]: Finished difference Result 19552 states and 49924 transitions. [2021-03-10 21:13:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:15,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:15,391 INFO L225 Difference]: With dead ends: 19552 [2021-03-10 21:13:15,391 INFO L226 Difference]: Without dead ends: 19458 [2021-03-10 21:13:15,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19458 states. [2021-03-10 21:13:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19458 to 18698. [2021-03-10 21:13:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18698 states, 18697 states have (on average 2.581858052093919) internal successors, (48273), 18697 states have internal predecessors, (48273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18698 states to 18698 states and 48273 transitions. [2021-03-10 21:13:15,635 INFO L78 Accepts]: Start accepts. Automaton has 18698 states and 48273 transitions. Word has length 53 [2021-03-10 21:13:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:15,636 INFO L480 AbstractCegarLoop]: Abstraction has 18698 states and 48273 transitions. [2021-03-10 21:13:15,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand 18698 states and 48273 transitions. [2021-03-10 21:13:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:15,645 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:15,645 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:15,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:15,846 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:15,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1242481334, now seen corresponding path program 185 times [2021-03-10 21:13:15,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:15,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177615263] [2021-03-10 21:13:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:15,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177615263] [2021-03-10 21:13:15,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342734943] [2021-03-10 21:13:15,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:15,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-03-10 21:13:15,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:15,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:15,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:16,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:16,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:13:16,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253643693] [2021-03-10 21:13:16,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:16,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:16,068 INFO L87 Difference]: Start difference. First operand 18698 states and 48273 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:16,536 INFO L93 Difference]: Finished difference Result 20069 states and 51059 transitions. [2021-03-10 21:13:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:16,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:16,558 INFO L225 Difference]: With dead ends: 20069 [2021-03-10 21:13:16,559 INFO L226 Difference]: Without dead ends: 20015 [2021-03-10 21:13:16,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20015 states. [2021-03-10 21:13:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20015 to 18744. [2021-03-10 21:13:16,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18744 states, 18743 states have (on average 2.581763858507176) internal successors, (48390), 18743 states have internal predecessors, (48390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18744 states to 18744 states and 48390 transitions. [2021-03-10 21:13:16,791 INFO L78 Accepts]: Start accepts. Automaton has 18744 states and 48390 transitions. Word has length 53 [2021-03-10 21:13:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:16,791 INFO L480 AbstractCegarLoop]: Abstraction has 18744 states and 48390 transitions. [2021-03-10 21:13:16,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 18744 states and 48390 transitions. [2021-03-10 21:13:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:16,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:16,801 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:17,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-03-10 21:13:17,001 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1085181847, now seen corresponding path program 101 times [2021-03-10 21:13:17,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:17,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003572920] [2021-03-10 21:13:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:17,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003572920] [2021-03-10 21:13:17,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557113682] [2021-03-10 21:13:17,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:17,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-03-10 21:13:17,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:17,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:17,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:17,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:17,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-03-10 21:13:17,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357289752] [2021-03-10 21:13:17,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:13:17,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:17,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:13:17,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:17,202 INFO L87 Difference]: Start difference. First operand 18744 states and 48390 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:17,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:17,440 INFO L93 Difference]: Finished difference Result 21514 states and 54054 transitions. [2021-03-10 21:13:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:13:17,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:17,464 INFO L225 Difference]: With dead ends: 21514 [2021-03-10 21:13:17,464 INFO L226 Difference]: Without dead ends: 21494 [2021-03-10 21:13:17,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21494 states. [2021-03-10 21:13:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21494 to 19105. [2021-03-10 21:13:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19105 states, 19104 states have (on average 2.583856783919598) internal successors, (49362), 19104 states have internal predecessors, (49362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19105 states to 19105 states and 49362 transitions. [2021-03-10 21:13:17,713 INFO L78 Accepts]: Start accepts. Automaton has 19105 states and 49362 transitions. Word has length 53 [2021-03-10 21:13:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:17,714 INFO L480 AbstractCegarLoop]: Abstraction has 19105 states and 49362 transitions. [2021-03-10 21:13:17,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 19105 states and 49362 transitions. [2021-03-10 21:13:17,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:17,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:17,724 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:17,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable668 [2021-03-10 21:13:17,927 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash -910568628, now seen corresponding path program 186 times [2021-03-10 21:13:17,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:17,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442660890] [2021-03-10 21:13:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:18,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442660890] [2021-03-10 21:13:18,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215390857] [2021-03-10 21:13:18,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:18,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-03-10 21:13:18,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:18,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:18,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:18,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:13:18,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235987123] [2021-03-10 21:13:18,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:18,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:18,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:18,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:18,200 INFO L87 Difference]: Start difference. First operand 19105 states and 49362 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:18,916 INFO L93 Difference]: Finished difference Result 22055 states and 55667 transitions. [2021-03-10 21:13:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:13:18,917 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:18,942 INFO L225 Difference]: With dead ends: 22055 [2021-03-10 21:13:18,942 INFO L226 Difference]: Without dead ends: 22001 [2021-03-10 21:13:18,943 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:13:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22001 states. [2021-03-10 21:13:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22001 to 19382. [2021-03-10 21:13:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19382 states, 19381 states have (on average 2.585676693669057) internal successors, (50113), 19381 states have internal predecessors, (50113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19382 states to 19382 states and 50113 transitions. [2021-03-10 21:13:19,207 INFO L78 Accepts]: Start accepts. Automaton has 19382 states and 50113 transitions. Word has length 53 [2021-03-10 21:13:19,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:19,207 INFO L480 AbstractCegarLoop]: Abstraction has 19382 states and 50113 transitions. [2021-03-10 21:13:19,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:19,207 INFO L276 IsEmpty]: Start isEmpty. Operand 19382 states and 50113 transitions. [2021-03-10 21:13:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:19,217 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:19,217 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:19,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable671 [2021-03-10 21:13:19,417 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:19,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:19,418 INFO L82 PathProgramCache]: Analyzing trace with hash 621990481, now seen corresponding path program 187 times [2021-03-10 21:13:19,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:19,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676624811] [2021-03-10 21:13:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:19,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676624811] [2021-03-10 21:13:19,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391015918] [2021-03-10 21:13:19,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:19,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:19,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:19,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:19,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:13:19,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616336454] [2021-03-10 21:13:19,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:19,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:19,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:19,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:19,603 INFO L87 Difference]: Start difference. First operand 19382 states and 50113 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:19,844 INFO L93 Difference]: Finished difference Result 22274 states and 56066 transitions. [2021-03-10 21:13:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:13:19,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:19,869 INFO L225 Difference]: With dead ends: 22274 [2021-03-10 21:13:19,870 INFO L226 Difference]: Without dead ends: 22250 [2021-03-10 21:13:19,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22250 states. [2021-03-10 21:13:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22250 to 19382. [2021-03-10 21:13:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19382 states, 19381 states have (on average 2.5847995459470616) internal successors, (50096), 19381 states have internal predecessors, (50096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19382 states to 19382 states and 50096 transitions. [2021-03-10 21:13:20,132 INFO L78 Accepts]: Start accepts. Automaton has 19382 states and 50096 transitions. Word has length 53 [2021-03-10 21:13:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:20,132 INFO L480 AbstractCegarLoop]: Abstraction has 19382 states and 50096 transitions. [2021-03-10 21:13:20,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 19382 states and 50096 transitions. [2021-03-10 21:13:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:20,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:20,143 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:20,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:20,344 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash -755732094, now seen corresponding path program 188 times [2021-03-10 21:13:20,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:20,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548705521] [2021-03-10 21:13:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:20,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548705521] [2021-03-10 21:13:20,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285013586] [2021-03-10 21:13:20,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:20,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:20,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:20,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:20,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:20,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:20,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:13:20,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273799957] [2021-03-10 21:13:20,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:20,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:20,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:20,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:20,549 INFO L87 Difference]: Start difference. First operand 19382 states and 50096 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:21,470 INFO L93 Difference]: Finished difference Result 25825 states and 64169 transitions. [2021-03-10 21:13:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:13:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:21,500 INFO L225 Difference]: With dead ends: 25825 [2021-03-10 21:13:21,500 INFO L226 Difference]: Without dead ends: 25645 [2021-03-10 21:13:21,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:13:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25645 states. [2021-03-10 21:13:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25645 to 19870. [2021-03-10 21:13:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19870 states, 19869 states have (on average 2.5872464643414363) internal successors, (51406), 19869 states have internal predecessors, (51406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19870 states to 19870 states and 51406 transitions. [2021-03-10 21:13:21,825 INFO L78 Accepts]: Start accepts. Automaton has 19870 states and 51406 transitions. Word has length 53 [2021-03-10 21:13:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:21,825 INFO L480 AbstractCegarLoop]: Abstraction has 19870 states and 51406 transitions. [2021-03-10 21:13:21,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 19870 states and 51406 transitions. [2021-03-10 21:13:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:21,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:21,835 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:22,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2021-03-10 21:13:22,036 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:22,036 INFO L82 PathProgramCache]: Analyzing trace with hash -369129417, now seen corresponding path program 189 times [2021-03-10 21:13:22,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:22,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389714810] [2021-03-10 21:13:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:22,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389714810] [2021-03-10 21:13:22,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686618283] [2021-03-10 21:13:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:22,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:13:22,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:22,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:22,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:22,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:22,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:13:22,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173465352] [2021-03-10 21:13:22,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:22,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:22,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:22,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:22,235 INFO L87 Difference]: Start difference. First operand 19870 states and 51406 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:22,476 INFO L93 Difference]: Finished difference Result 22895 states and 57607 transitions. [2021-03-10 21:13:22,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:13:22,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:22,501 INFO L225 Difference]: With dead ends: 22895 [2021-03-10 21:13:22,501 INFO L226 Difference]: Without dead ends: 22862 [2021-03-10 21:13:22,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:22,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22862 states. [2021-03-10 21:13:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22862 to 19870. [2021-03-10 21:13:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19870 states, 19869 states have (on average 2.5867934974080224) internal successors, (51397), 19869 states have internal predecessors, (51397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19870 states to 19870 states and 51397 transitions. [2021-03-10 21:13:22,768 INFO L78 Accepts]: Start accepts. Automaton has 19870 states and 51397 transitions. Word has length 53 [2021-03-10 21:13:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:22,768 INFO L480 AbstractCegarLoop]: Abstraction has 19870 states and 51397 transitions. [2021-03-10 21:13:22,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 19870 states and 51397 transitions. [2021-03-10 21:13:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:22,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:22,779 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:22,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:22,979 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash -815423604, now seen corresponding path program 190 times [2021-03-10 21:13:22,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:22,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801970740] [2021-03-10 21:13:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:23,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801970740] [2021-03-10 21:13:23,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038438974] [2021-03-10 21:13:23,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:23,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:23,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:23,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:23,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:23,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:23,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:13:23,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030661994] [2021-03-10 21:13:23,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:13:23,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:23,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:13:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:23,196 INFO L87 Difference]: Start difference. First operand 19870 states and 51397 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:24,560 INFO L93 Difference]: Finished difference Result 30121 states and 74105 transitions. [2021-03-10 21:13:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 21:13:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:24,595 INFO L225 Difference]: With dead ends: 30121 [2021-03-10 21:13:24,595 INFO L226 Difference]: Without dead ends: 29845 [2021-03-10 21:13:24,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 706.5ms TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 21:13:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29845 states. [2021-03-10 21:13:24,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29845 to 20316. [2021-03-10 21:13:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20316 states, 20315 states have (on average 2.589367462466158) internal successors, (52603), 20315 states have internal predecessors, (52603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20316 states to 20316 states and 52603 transitions. [2021-03-10 21:13:24,912 INFO L78 Accepts]: Start accepts. Automaton has 20316 states and 52603 transitions. Word has length 53 [2021-03-10 21:13:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:24,913 INFO L480 AbstractCegarLoop]: Abstraction has 20316 states and 52603 transitions. [2021-03-10 21:13:24,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 20316 states and 52603 transitions. [2021-03-10 21:13:24,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:24,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:24,924 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:25,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:25,124 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1078149265, now seen corresponding path program 191 times [2021-03-10 21:13:25,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:25,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927295637] [2021-03-10 21:13:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:25,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927295637] [2021-03-10 21:13:25,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419285190] [2021-03-10 21:13:25,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:25,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:13:25,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:25,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:25,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:25,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-03-10 21:13:25,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557286849] [2021-03-10 21:13:25,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:13:25,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:13:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:25,433 INFO L87 Difference]: Start difference. First operand 20316 states and 52603 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:25,825 INFO L93 Difference]: Finished difference Result 23542 states and 59224 transitions. [2021-03-10 21:13:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:25,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:25,852 INFO L225 Difference]: With dead ends: 23542 [2021-03-10 21:13:25,852 INFO L226 Difference]: Without dead ends: 23500 [2021-03-10 21:13:25,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:13:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23500 states. [2021-03-10 21:13:26,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23500 to 19982. [2021-03-10 21:13:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19982 states, 19981 states have (on average 2.5859566588258844) internal successors, (51670), 19981 states have internal predecessors, (51670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19982 states to 19982 states and 51670 transitions. [2021-03-10 21:13:26,132 INFO L78 Accepts]: Start accepts. Automaton has 19982 states and 51670 transitions. Word has length 53 [2021-03-10 21:13:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:26,132 INFO L480 AbstractCegarLoop]: Abstraction has 19982 states and 51670 transitions. [2021-03-10 21:13:26,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 19982 states and 51670 transitions. [2021-03-10 21:13:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:26,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:26,143 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:26,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-03-10 21:13:26,343 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:26,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:26,344 INFO L82 PathProgramCache]: Analyzing trace with hash -968737470, now seen corresponding path program 192 times [2021-03-10 21:13:26,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:26,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177984579] [2021-03-10 21:13:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:26,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177984579] [2021-03-10 21:13:26,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287652347] [2021-03-10 21:13:26,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:26,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-03-10 21:13:26,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:26,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:26,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:26,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:26,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:13:26,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528631922] [2021-03-10 21:13:26,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:13:26,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:26,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:13:26,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:26,582 INFO L87 Difference]: Start difference. First operand 19982 states and 51670 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:27,364 INFO L93 Difference]: Finished difference Result 24985 states and 61884 transitions. [2021-03-10 21:13:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:13:27,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:27,393 INFO L225 Difference]: With dead ends: 24985 [2021-03-10 21:13:27,393 INFO L226 Difference]: Without dead ends: 24607 [2021-03-10 21:13:27,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:13:27,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24607 states. [2021-03-10 21:13:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24607 to 18827. [2021-03-10 21:13:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18827 states, 18826 states have (on average 2.575215128014448) internal successors, (48481), 18826 states have internal predecessors, (48481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18827 states to 18827 states and 48481 transitions. [2021-03-10 21:13:27,649 INFO L78 Accepts]: Start accepts. Automaton has 18827 states and 48481 transitions. Word has length 53 [2021-03-10 21:13:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:27,649 INFO L480 AbstractCegarLoop]: Abstraction has 18827 states and 48481 transitions. [2021-03-10 21:13:27,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 18827 states and 48481 transitions. [2021-03-10 21:13:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:27,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:27,659 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:27,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-03-10 21:13:27,859 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:27,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1828679397, now seen corresponding path program 102 times [2021-03-10 21:13:27,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:27,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406195115] [2021-03-10 21:13:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:27,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406195115] [2021-03-10 21:13:27,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67194945] [2021-03-10 21:13:27,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:27,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-03-10 21:13:27,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:27,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:27,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:28,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:28,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:13:28,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724554043] [2021-03-10 21:13:28,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:28,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:28,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:28,051 INFO L87 Difference]: Start difference. First operand 18827 states and 48481 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:28,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:28,355 INFO L93 Difference]: Finished difference Result 25910 states and 64466 transitions. [2021-03-10 21:13:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:13:28,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:28,386 INFO L225 Difference]: With dead ends: 25910 [2021-03-10 21:13:28,386 INFO L226 Difference]: Without dead ends: 25910 [2021-03-10 21:13:28,386 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25910 states. [2021-03-10 21:13:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25910 to 19052. [2021-03-10 21:13:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 2.5807569156474726) internal successors, (49166), 19051 states have internal predecessors, (49166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 49166 transitions. [2021-03-10 21:13:28,704 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 49166 transitions. Word has length 53 [2021-03-10 21:13:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:28,704 INFO L480 AbstractCegarLoop]: Abstraction has 19052 states and 49166 transitions. [2021-03-10 21:13:28,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 49166 transitions. [2021-03-10 21:13:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:28,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:28,714 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:28,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:28,915 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:28,915 INFO L82 PathProgramCache]: Analyzing trace with hash 828715443, now seen corresponding path program 103 times [2021-03-10 21:13:28,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:28,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250169285] [2021-03-10 21:13:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:28,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250169285] [2021-03-10 21:13:28,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359383593] [2021-03-10 21:13:28,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:29,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:29,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:29,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:13:29,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236683123] [2021-03-10 21:13:29,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:29,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:29,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:29,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:29,115 INFO L87 Difference]: Start difference. First operand 19052 states and 49166 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:29,499 INFO L93 Difference]: Finished difference Result 27902 states and 69255 transitions. [2021-03-10 21:13:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:13:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:29,532 INFO L225 Difference]: With dead ends: 27902 [2021-03-10 21:13:29,533 INFO L226 Difference]: Without dead ends: 27902 [2021-03-10 21:13:29,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:13:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27902 states. [2021-03-10 21:13:29,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27902 to 19100. [2021-03-10 21:13:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19100 states, 19099 states have (on average 2.581653489711503) internal successors, (49307), 19099 states have internal predecessors, (49307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19100 states to 19100 states and 49307 transitions. [2021-03-10 21:13:29,831 INFO L78 Accepts]: Start accepts. Automaton has 19100 states and 49307 transitions. Word has length 53 [2021-03-10 21:13:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:29,831 INFO L480 AbstractCegarLoop]: Abstraction has 19100 states and 49307 transitions. [2021-03-10 21:13:29,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 19100 states and 49307 transitions. [2021-03-10 21:13:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:29,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:29,841 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:30,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:30,042 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:30,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:30,042 INFO L82 PathProgramCache]: Analyzing trace with hash -861279721, now seen corresponding path program 104 times [2021-03-10 21:13:30,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:30,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959865721] [2021-03-10 21:13:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:30,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959865721] [2021-03-10 21:13:30,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463667303] [2021-03-10 21:13:30,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:30,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:30,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:30,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:30,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:30,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:30,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:13:30,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963016001] [2021-03-10 21:13:30,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:13:30,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:30,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:13:30,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:30,252 INFO L87 Difference]: Start difference. First operand 19100 states and 49307 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:30,683 INFO L93 Difference]: Finished difference Result 27695 states and 68780 transitions. [2021-03-10 21:13:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:13:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:30,716 INFO L225 Difference]: With dead ends: 27695 [2021-03-10 21:13:30,716 INFO L226 Difference]: Without dead ends: 27695 [2021-03-10 21:13:30,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:13:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27695 states. [2021-03-10 21:13:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27695 to 19141. [2021-03-10 21:13:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19141 states, 19140 states have (on average 2.5824973876698016) internal successors, (49429), 19140 states have internal predecessors, (49429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19141 states to 19141 states and 49429 transitions. [2021-03-10 21:13:31,011 INFO L78 Accepts]: Start accepts. Automaton has 19141 states and 49429 transitions. Word has length 53 [2021-03-10 21:13:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:31,011 INFO L480 AbstractCegarLoop]: Abstraction has 19141 states and 49429 transitions. [2021-03-10 21:13:31,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 19141 states and 49429 transitions. [2021-03-10 21:13:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:31,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:31,021 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:31,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:31,222 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:31,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:31,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1900566733, now seen corresponding path program 105 times [2021-03-10 21:13:31,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:31,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590231442] [2021-03-10 21:13:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:31,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590231442] [2021-03-10 21:13:31,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653285088] [2021-03-10 21:13:31,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:31,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-03-10 21:13:31,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:31,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:13:31,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 112 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:31,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:31,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-03-10 21:13:31,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111691877] [2021-03-10 21:13:31,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:31,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:31,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:31,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:31,497 INFO L87 Difference]: Start difference. First operand 19141 states and 49429 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:31,984 INFO L93 Difference]: Finished difference Result 21462 states and 53840 transitions. [2021-03-10 21:13:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:13:31,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:32,009 INFO L225 Difference]: With dead ends: 21462 [2021-03-10 21:13:32,009 INFO L226 Difference]: Without dead ends: 21462 [2021-03-10 21:13:32,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:13:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21462 states. [2021-03-10 21:13:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21462 to 18659. [2021-03-10 21:13:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18659 states, 18658 states have (on average 2.5785185979204632) internal successors, (48110), 18658 states have internal predecessors, (48110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18659 states to 18659 states and 48110 transitions. [2021-03-10 21:13:32,301 INFO L78 Accepts]: Start accepts. Automaton has 18659 states and 48110 transitions. Word has length 53 [2021-03-10 21:13:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:32,301 INFO L480 AbstractCegarLoop]: Abstraction has 18659 states and 48110 transitions. [2021-03-10 21:13:32,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 18659 states and 48110 transitions. [2021-03-10 21:13:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:32,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:32,312 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:32,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:32,512 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:32,512 INFO L82 PathProgramCache]: Analyzing trace with hash -219319817, now seen corresponding path program 193 times [2021-03-10 21:13:32,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:32,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694821515] [2021-03-10 21:13:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:32,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694821515] [2021-03-10 21:13:32,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521725935] [2021-03-10 21:13:32,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:32,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:32,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:32,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:32,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 21:13:32,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454492624] [2021-03-10 21:13:32,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:13:32,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:32,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:13:32,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:32,735 INFO L87 Difference]: Start difference. First operand 18659 states and 48110 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:33,018 INFO L93 Difference]: Finished difference Result 21232 states and 53477 transitions. [2021-03-10 21:13:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:13:33,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:33,041 INFO L225 Difference]: With dead ends: 21232 [2021-03-10 21:13:33,041 INFO L226 Difference]: Without dead ends: 21187 [2021-03-10 21:13:33,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:13:33,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21187 states. [2021-03-10 21:13:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21187 to 18659. [2021-03-10 21:13:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18659 states, 18658 states have (on average 2.5780362311073) internal successors, (48101), 18658 states have internal predecessors, (48101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18659 states to 18659 states and 48101 transitions. [2021-03-10 21:13:33,281 INFO L78 Accepts]: Start accepts. Automaton has 18659 states and 48101 transitions. Word has length 53 [2021-03-10 21:13:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:33,281 INFO L480 AbstractCegarLoop]: Abstraction has 18659 states and 48101 transitions. [2021-03-10 21:13:33,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 18659 states and 48101 transitions. [2021-03-10 21:13:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:33,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:33,291 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:33,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable696,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:33,491 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:33,491 INFO L82 PathProgramCache]: Analyzing trace with hash 884085766, now seen corresponding path program 106 times [2021-03-10 21:13:33,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:33,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443133400] [2021-03-10 21:13:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:33,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443133400] [2021-03-10 21:13:33,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451468440] [2021-03-10 21:13:33,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:33,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:33,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:33,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:33,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:13:33,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869498308] [2021-03-10 21:13:33,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:33,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:33,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:33,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:33,694 INFO L87 Difference]: Start difference. First operand 18659 states and 48101 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:34,200 INFO L93 Difference]: Finished difference Result 19898 states and 50622 transitions. [2021-03-10 21:13:34,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:34,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:34,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:34,222 INFO L225 Difference]: With dead ends: 19898 [2021-03-10 21:13:34,222 INFO L226 Difference]: Without dead ends: 19881 [2021-03-10 21:13:34,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19881 states. [2021-03-10 21:13:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19881 to 18804. [2021-03-10 21:13:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18804 states, 18803 states have (on average 2.5758655533691432) internal successors, (48434), 18803 states have internal predecessors, (48434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18804 states to 18804 states and 48434 transitions. [2021-03-10 21:13:34,459 INFO L78 Accepts]: Start accepts. Automaton has 18804 states and 48434 transitions. Word has length 53 [2021-03-10 21:13:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:34,459 INFO L480 AbstractCegarLoop]: Abstraction has 18804 states and 48434 transitions. [2021-03-10 21:13:34,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 18804 states and 48434 transitions. [2021-03-10 21:13:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:34,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:34,469 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:34,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-03-10 21:13:34,669 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash -462548525, now seen corresponding path program 194 times [2021-03-10 21:13:34,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:34,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108692600] [2021-03-10 21:13:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:34,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108692600] [2021-03-10 21:13:34,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93008216] [2021-03-10 21:13:34,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:34,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:34,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:34,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:34,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:34,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:13:34,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714428307] [2021-03-10 21:13:34,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:34,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:34,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:34,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:34,855 INFO L87 Difference]: Start difference. First operand 18804 states and 48434 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:35,059 INFO L93 Difference]: Finished difference Result 21650 states and 54333 transitions. [2021-03-10 21:13:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:13:35,060 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:35,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:35,083 INFO L225 Difference]: With dead ends: 21650 [2021-03-10 21:13:35,083 INFO L226 Difference]: Without dead ends: 21632 [2021-03-10 21:13:35,083 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21632 states. [2021-03-10 21:13:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21632 to 18804. [2021-03-10 21:13:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18804 states, 18803 states have (on average 2.5746423443067594) internal successors, (48411), 18803 states have internal predecessors, (48411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18804 states to 18804 states and 48411 transitions. [2021-03-10 21:13:35,370 INFO L78 Accepts]: Start accepts. Automaton has 18804 states and 48411 transitions. Word has length 53 [2021-03-10 21:13:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:35,370 INFO L480 AbstractCegarLoop]: Abstraction has 18804 states and 48411 transitions. [2021-03-10 21:13:35,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 18804 states and 48411 transitions. [2021-03-10 21:13:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:35,379 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:35,379 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:35,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:35,580 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:35,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1910548538, now seen corresponding path program 195 times [2021-03-10 21:13:35,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:35,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853182743] [2021-03-10 21:13:35,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:35,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853182743] [2021-03-10 21:13:35,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28751812] [2021-03-10 21:13:35,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:35,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-03-10 21:13:35,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:35,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:35,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:35,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:35,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:13:35,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345483761] [2021-03-10 21:13:35,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:35,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:35,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:35,797 INFO L87 Difference]: Start difference. First operand 18804 states and 48411 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:36,437 INFO L93 Difference]: Finished difference Result 19541 states and 49768 transitions. [2021-03-10 21:13:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:36,438 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:36,459 INFO L225 Difference]: With dead ends: 19541 [2021-03-10 21:13:36,459 INFO L226 Difference]: Without dead ends: 19429 [2021-03-10 21:13:36,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19429 states. [2021-03-10 21:13:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19429 to 18738. [2021-03-10 21:13:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18738 states, 18737 states have (on average 2.572450232160965) internal successors, (48200), 18737 states have internal predecessors, (48200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18738 states to 18738 states and 48200 transitions. [2021-03-10 21:13:36,692 INFO L78 Accepts]: Start accepts. Automaton has 18738 states and 48200 transitions. Word has length 53 [2021-03-10 21:13:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:36,692 INFO L480 AbstractCegarLoop]: Abstraction has 18738 states and 48200 transitions. [2021-03-10 21:13:36,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand 18738 states and 48200 transitions. [2021-03-10 21:13:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:36,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:36,702 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:36,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:36,902 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1770882578, now seen corresponding path program 196 times [2021-03-10 21:13:36,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:36,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222424509] [2021-03-10 21:13:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:36,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222424509] [2021-03-10 21:13:36,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404848447] [2021-03-10 21:13:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:37,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:37,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:37,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:37,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:37,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:37,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:13:37,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347989698] [2021-03-10 21:13:37,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:37,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:37,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:37,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:37,112 INFO L87 Difference]: Start difference. First operand 18738 states and 48200 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:37,583 INFO L93 Difference]: Finished difference Result 20077 states and 50948 transitions. [2021-03-10 21:13:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:37,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:37,605 INFO L225 Difference]: With dead ends: 20077 [2021-03-10 21:13:37,605 INFO L226 Difference]: Without dead ends: 20014 [2021-03-10 21:13:37,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20014 states. [2021-03-10 21:13:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20014 to 18832. [2021-03-10 21:13:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18832 states, 18831 states have (on average 2.572354096967766) internal successors, (48440), 18831 states have internal predecessors, (48440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18832 states to 18832 states and 48440 transitions. [2021-03-10 21:13:37,843 INFO L78 Accepts]: Start accepts. Automaton has 18832 states and 48440 transitions. Word has length 53 [2021-03-10 21:13:37,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:37,843 INFO L480 AbstractCegarLoop]: Abstraction has 18832 states and 48440 transitions. [2021-03-10 21:13:37,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 18832 states and 48440 transitions. [2021-03-10 21:13:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:37,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:37,853 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:38,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:38,053 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:38,053 INFO L82 PathProgramCache]: Analyzing trace with hash -382167384, now seen corresponding path program 197 times [2021-03-10 21:13:38,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:38,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253602589] [2021-03-10 21:13:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253602589] [2021-03-10 21:13:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316806362] [2021-03-10 21:13:38,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:38,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-03-10 21:13:38,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:38,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:38,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:38,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:38,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:13:38,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851866959] [2021-03-10 21:13:38,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:38,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:38,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:38,258 INFO L87 Difference]: Start difference. First operand 18832 states and 48440 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:38,964 INFO L93 Difference]: Finished difference Result 21835 states and 54919 transitions. [2021-03-10 21:13:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:13:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:38,989 INFO L225 Difference]: With dead ends: 21835 [2021-03-10 21:13:38,989 INFO L226 Difference]: Without dead ends: 21781 [2021-03-10 21:13:38,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:13:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21781 states. [2021-03-10 21:13:39,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21781 to 19157. [2021-03-10 21:13:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19157 states, 19156 states have (on average 2.575067863854667) internal successors, (49328), 19156 states have internal predecessors, (49328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:39,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19157 states to 19157 states and 49328 transitions. [2021-03-10 21:13:39,275 INFO L78 Accepts]: Start accepts. Automaton has 19157 states and 49328 transitions. Word has length 53 [2021-03-10 21:13:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:39,275 INFO L480 AbstractCegarLoop]: Abstraction has 19157 states and 49328 transitions. [2021-03-10 21:13:39,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 19157 states and 49328 transitions. [2021-03-10 21:13:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:39,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:39,285 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:39,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:39,485 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:39,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1150391725, now seen corresponding path program 198 times [2021-03-10 21:13:39,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:39,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663110106] [2021-03-10 21:13:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:39,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663110106] [2021-03-10 21:13:39,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642038764] [2021-03-10 21:13:39,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:39,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-03-10 21:13:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:39,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:39,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:39,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:13:39,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041428963] [2021-03-10 21:13:39,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:39,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:39,679 INFO L87 Difference]: Start difference. First operand 19157 states and 49328 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:39,907 INFO L93 Difference]: Finished difference Result 22151 states and 55518 transitions. [2021-03-10 21:13:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:13:39,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:39,932 INFO L225 Difference]: With dead ends: 22151 [2021-03-10 21:13:39,932 INFO L226 Difference]: Without dead ends: 22127 [2021-03-10 21:13:39,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22127 states. [2021-03-10 21:13:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22127 to 19157. [2021-03-10 21:13:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19157 states, 19156 states have (on average 2.574180413447484) internal successors, (49311), 19156 states have internal predecessors, (49311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19157 states to 19157 states and 49311 transitions. [2021-03-10 21:13:40,192 INFO L78 Accepts]: Start accepts. Automaton has 19157 states and 49311 transitions. Word has length 53 [2021-03-10 21:13:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:40,192 INFO L480 AbstractCegarLoop]: Abstraction has 19157 states and 49311 transitions. [2021-03-10 21:13:40,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 19157 states and 49311 transitions. [2021-03-10 21:13:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:40,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:40,202 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:40,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-03-10 21:13:40,403 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:40,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:40,403 INFO L82 PathProgramCache]: Analyzing trace with hash -227330850, now seen corresponding path program 199 times [2021-03-10 21:13:40,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:40,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648917756] [2021-03-10 21:13:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:40,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648917756] [2021-03-10 21:13:40,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441141012] [2021-03-10 21:13:40,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:40,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:40,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:40,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:13:40,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083212197] [2021-03-10 21:13:40,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:40,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:40,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:40,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:40,613 INFO L87 Difference]: Start difference. First operand 19157 states and 49311 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:41,731 INFO L93 Difference]: Finished difference Result 25856 states and 64087 transitions. [2021-03-10 21:13:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:13:41,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:41,761 INFO L225 Difference]: With dead ends: 25856 [2021-03-10 21:13:41,761 INFO L226 Difference]: Without dead ends: 25688 [2021-03-10 21:13:41,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:13:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25688 states. [2021-03-10 21:13:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25688 to 19780. [2021-03-10 21:13:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19780 states, 19779 states have (on average 2.577531725567521) internal successors, (50981), 19779 states have internal predecessors, (50981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19780 states to 19780 states and 50981 transitions. [2021-03-10 21:13:42,058 INFO L78 Accepts]: Start accepts. Automaton has 19780 states and 50981 transitions. Word has length 53 [2021-03-10 21:13:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:42,058 INFO L480 AbstractCegarLoop]: Abstraction has 19780 states and 50981 transitions. [2021-03-10 21:13:42,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 19780 states and 50981 transitions. [2021-03-10 21:13:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:42,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:42,068 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:42,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:42,269 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash 159271827, now seen corresponding path program 200 times [2021-03-10 21:13:42,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:42,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858008545] [2021-03-10 21:13:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:42,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858008545] [2021-03-10 21:13:42,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702312306] [2021-03-10 21:13:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:42,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:42,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:42,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:42,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:13:42,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505939053] [2021-03-10 21:13:42,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:42,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:42,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:42,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:42,469 INFO L87 Difference]: Start difference. First operand 19780 states and 50981 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:42,747 INFO L93 Difference]: Finished difference Result 22950 states and 57504 transitions. [2021-03-10 21:13:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:13:42,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:42,773 INFO L225 Difference]: With dead ends: 22950 [2021-03-10 21:13:42,773 INFO L226 Difference]: Without dead ends: 22917 [2021-03-10 21:13:42,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:13:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22917 states. [2021-03-10 21:13:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22917 to 19780. [2021-03-10 21:13:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19780 states, 19779 states have (on average 2.5770766975074575) internal successors, (50972), 19779 states have internal predecessors, (50972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19780 states to 19780 states and 50972 transitions. [2021-03-10 21:13:43,042 INFO L78 Accepts]: Start accepts. Automaton has 19780 states and 50972 transitions. Word has length 53 [2021-03-10 21:13:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:43,043 INFO L480 AbstractCegarLoop]: Abstraction has 19780 states and 50972 transitions. [2021-03-10 21:13:43,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 19780 states and 50972 transitions. [2021-03-10 21:13:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:43,052 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:43,052 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:43,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:43,253 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash -287022360, now seen corresponding path program 201 times [2021-03-10 21:13:43,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:43,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996320164] [2021-03-10 21:13:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:43,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996320164] [2021-03-10 21:13:43,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162825500] [2021-03-10 21:13:43,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:43,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 21:13:43,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:43,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:43,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:43,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:13:43,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556513699] [2021-03-10 21:13:43,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:13:43,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:43,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:13:43,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:43,492 INFO L87 Difference]: Start difference. First operand 19780 states and 50972 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:45,096 INFO L93 Difference]: Finished difference Result 34794 states and 84439 transitions. [2021-03-10 21:13:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-03-10 21:13:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:45,135 INFO L225 Difference]: With dead ends: 34794 [2021-03-10 21:13:45,135 INFO L226 Difference]: Without dead ends: 34272 [2021-03-10 21:13:45,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 903.1ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-03-10 21:13:45,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34272 states. [2021-03-10 21:13:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34272 to 20774. [2021-03-10 21:13:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20774 states, 20773 states have (on average 2.5814759543638375) internal successors, (53625), 20773 states have internal predecessors, (53625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20774 states to 20774 states and 53625 transitions. [2021-03-10 21:13:45,485 INFO L78 Accepts]: Start accepts. Automaton has 20774 states and 53625 transitions. Word has length 53 [2021-03-10 21:13:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:45,485 INFO L480 AbstractCegarLoop]: Abstraction has 20774 states and 53625 transitions. [2021-03-10 21:13:45,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 20774 states and 53625 transitions. [2021-03-10 21:13:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:45,496 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:45,496 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:45,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-03-10 21:13:45,696 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:45,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1606550509, now seen corresponding path program 202 times [2021-03-10 21:13:45,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:45,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161844277] [2021-03-10 21:13:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:45,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161844277] [2021-03-10 21:13:45,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827200918] [2021-03-10 21:13:45,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:45,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:45,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:45,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:45,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:45,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:13:45,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726998327] [2021-03-10 21:13:45,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:13:45,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:45,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:13:45,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:45,919 INFO L87 Difference]: Start difference. First operand 20774 states and 53625 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:46,241 INFO L93 Difference]: Finished difference Result 24229 states and 60687 transitions. [2021-03-10 21:13:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:13:46,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:46,268 INFO L225 Difference]: With dead ends: 24229 [2021-03-10 21:13:46,268 INFO L226 Difference]: Without dead ends: 24187 [2021-03-10 21:13:46,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24187 states. [2021-03-10 21:13:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24187 to 20774. [2021-03-10 21:13:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20774 states, 20773 states have (on average 2.58104269965821) internal successors, (53616), 20773 states have internal predecessors, (53616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20774 states to 20774 states and 53616 transitions. [2021-03-10 21:13:46,577 INFO L78 Accepts]: Start accepts. Automaton has 20774 states and 53616 transitions. Word has length 53 [2021-03-10 21:13:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:46,577 INFO L480 AbstractCegarLoop]: Abstraction has 20774 states and 53616 transitions. [2021-03-10 21:13:46,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 20774 states and 53616 transitions. [2021-03-10 21:13:46,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:46,587 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:46,587 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:46,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:46,788 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash -440336226, now seen corresponding path program 203 times [2021-03-10 21:13:46,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:46,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016604782] [2021-03-10 21:13:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:46,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016604782] [2021-03-10 21:13:46,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374561677] [2021-03-10 21:13:46,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:46,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-03-10 21:13:46,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:46,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:46,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:47,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:47,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:13:47,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303046] [2021-03-10 21:13:47,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:13:47,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:47,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:13:47,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:47,045 INFO L87 Difference]: Start difference. First operand 20774 states and 53616 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:49,495 INFO L93 Difference]: Finished difference Result 42542 states and 102891 transitions. [2021-03-10 21:13:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-03-10 21:13:49,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:49,544 INFO L225 Difference]: With dead ends: 42542 [2021-03-10 21:13:49,544 INFO L226 Difference]: Without dead ends: 41924 [2021-03-10 21:13:49,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6564 ImplicationChecksByTransitivity, 1671.1ms TimeCoverageRelationStatistics Valid=1461, Invalid=15051, Unknown=0, NotChecked=0, Total=16512 [2021-03-10 21:13:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41924 states. [2021-03-10 21:13:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41924 to 21585. [2021-03-10 21:13:49,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21585 states, 21584 states have (on average 2.583441438102298) internal successors, (55761), 21584 states have internal predecessors, (55761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21585 states to 21585 states and 55761 transitions. [2021-03-10 21:13:50,081 INFO L78 Accepts]: Start accepts. Automaton has 21585 states and 55761 transitions. Word has length 53 [2021-03-10 21:13:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:50,082 INFO L480 AbstractCegarLoop]: Abstraction has 21585 states and 55761 transitions. [2021-03-10 21:13:50,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 21585 states and 55761 transitions. [2021-03-10 21:13:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:50,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:50,091 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:50,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable727 [2021-03-10 21:13:50,291 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:50,291 INFO L82 PathProgramCache]: Analyzing trace with hash 309081427, now seen corresponding path program 204 times [2021-03-10 21:13:50,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:50,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630584972] [2021-03-10 21:13:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:50,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630584972] [2021-03-10 21:13:50,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413614227] [2021-03-10 21:13:50,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:50,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:13:50,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:50,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:50,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:50,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:50,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 21:13:50,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793558863] [2021-03-10 21:13:50,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:13:50,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:13:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:50,523 INFO L87 Difference]: Start difference. First operand 21585 states and 55761 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:50,847 INFO L93 Difference]: Finished difference Result 25184 states and 63104 transitions. [2021-03-10 21:13:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:13:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:50,877 INFO L225 Difference]: With dead ends: 25184 [2021-03-10 21:13:50,877 INFO L226 Difference]: Without dead ends: 25133 [2021-03-10 21:13:50,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:13:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25133 states. [2021-03-10 21:13:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25133 to 21275. [2021-03-10 21:13:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21275 states, 21274 states have (on average 2.580661840744571) internal successors, (54901), 21274 states have internal predecessors, (54901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21275 states to 21275 states and 54901 transitions. [2021-03-10 21:13:51,175 INFO L78 Accepts]: Start accepts. Automaton has 21275 states and 54901 transitions. Word has length 53 [2021-03-10 21:13:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:51,175 INFO L480 AbstractCegarLoop]: Abstraction has 21275 states and 54901 transitions. [2021-03-10 21:13:51,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,175 INFO L276 IsEmpty]: Start isEmpty. Operand 21275 states and 54901 transitions. [2021-03-10 21:13:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:51,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:51,186 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:51,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:51,386 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:51,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2031484712, now seen corresponding path program 205 times [2021-03-10 21:13:51,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:51,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53750721] [2021-03-10 21:13:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:51,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53750721] [2021-03-10 21:13:51,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521296256] [2021-03-10 21:13:51,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:51,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:13:51,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:51,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:51,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:13:51,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686322182] [2021-03-10 21:13:51,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:13:51,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:51,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:13:51,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:51,631 INFO L87 Difference]: Start difference. First operand 21275 states and 54901 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:52,499 INFO L93 Difference]: Finished difference Result 29892 states and 72882 transitions. [2021-03-10 21:13:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:13:52,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:52,533 INFO L225 Difference]: With dead ends: 29892 [2021-03-10 21:13:52,533 INFO L226 Difference]: Without dead ends: 29052 [2021-03-10 21:13:52,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:13:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29052 states. [2021-03-10 21:13:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29052 to 18251. [2021-03-10 21:13:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18251 states, 18250 states have (on average 2.5656438356164384) internal successors, (46823), 18250 states have internal predecessors, (46823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18251 states to 18251 states and 46823 transitions. [2021-03-10 21:13:52,806 INFO L78 Accepts]: Start accepts. Automaton has 18251 states and 46823 transitions. Word has length 53 [2021-03-10 21:13:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:52,806 INFO L480 AbstractCegarLoop]: Abstraction has 18251 states and 46823 transitions. [2021-03-10 21:13:52,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 18251 states and 46823 transitions. [2021-03-10 21:13:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:52,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:52,816 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:53,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable735 [2021-03-10 21:13:53,016 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1793423195, now seen corresponding path program 107 times [2021-03-10 21:13:53,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:53,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442659387] [2021-03-10 21:13:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:53,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442659387] [2021-03-10 21:13:53,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994123603] [2021-03-10 21:13:53,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:53,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-03-10 21:13:53,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:53,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:53,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:53,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:53,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 18 [2021-03-10 21:13:53,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772826658] [2021-03-10 21:13:53,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:53,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:53,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:53,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:53,287 INFO L87 Difference]: Start difference. First operand 18251 states and 46823 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:53,777 INFO L93 Difference]: Finished difference Result 21226 states and 53133 transitions. [2021-03-10 21:13:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:13:53,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:53,801 INFO L225 Difference]: With dead ends: 21226 [2021-03-10 21:13:53,801 INFO L226 Difference]: Without dead ends: 21212 [2021-03-10 21:13:53,801 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:13:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21212 states. [2021-03-10 21:13:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21212 to 18650. [2021-03-10 21:13:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18650 states, 18649 states have (on average 2.5690921765242103) internal successors, (47911), 18649 states have internal predecessors, (47911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18650 states to 18650 states and 47911 transitions. [2021-03-10 21:13:54,063 INFO L78 Accepts]: Start accepts. Automaton has 18650 states and 47911 transitions. Word has length 53 [2021-03-10 21:13:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:54,063 INFO L480 AbstractCegarLoop]: Abstraction has 18650 states and 47911 transitions. [2021-03-10 21:13:54,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 18650 states and 47911 transitions. [2021-03-10 21:13:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:54,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:54,073 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:54,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:54,273 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:54,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1171542785, now seen corresponding path program 108 times [2021-03-10 21:13:54,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:54,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387917066] [2021-03-10 21:13:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:54,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387917066] [2021-03-10 21:13:54,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735806534] [2021-03-10 21:13:54,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:54,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-03-10 21:13:54,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:54,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:54,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:54,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:54,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:13:54,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905502287] [2021-03-10 21:13:54,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:54,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:54,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:54,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:54,468 INFO L87 Difference]: Start difference. First operand 18650 states and 47911 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:54,746 INFO L93 Difference]: Finished difference Result 24382 states and 60480 transitions. [2021-03-10 21:13:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:54,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:54,773 INFO L225 Difference]: With dead ends: 24382 [2021-03-10 21:13:54,773 INFO L226 Difference]: Without dead ends: 24382 [2021-03-10 21:13:54,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:13:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24382 states. [2021-03-10 21:13:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24382 to 18658. [2021-03-10 21:13:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18658 states, 18657 states have (on average 2.5693305461756983) internal successors, (47936), 18657 states have internal predecessors, (47936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18658 states to 18658 states and 47936 transitions. [2021-03-10 21:13:55,035 INFO L78 Accepts]: Start accepts. Automaton has 18658 states and 47936 transitions. Word has length 53 [2021-03-10 21:13:55,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:55,035 INFO L480 AbstractCegarLoop]: Abstraction has 18658 states and 47936 transitions. [2021-03-10 21:13:55,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,035 INFO L276 IsEmpty]: Start isEmpty. Operand 18658 states and 47936 transitions. [2021-03-10 21:13:55,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:55,044 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:55,044 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:55,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-03-10 21:13:55,245 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:55,245 INFO L82 PathProgramCache]: Analyzing trace with hash -466029671, now seen corresponding path program 109 times [2021-03-10 21:13:55,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:55,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109033088] [2021-03-10 21:13:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:55,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109033088] [2021-03-10 21:13:55,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796726599] [2021-03-10 21:13:55,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:55,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:55,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:55,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:13:55,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486294781] [2021-03-10 21:13:55,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:55,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:55,450 INFO L87 Difference]: Start difference. First operand 18658 states and 47936 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:55,846 INFO L93 Difference]: Finished difference Result 26313 states and 65049 transitions. [2021-03-10 21:13:55,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:13:55,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:55,878 INFO L225 Difference]: With dead ends: 26313 [2021-03-10 21:13:55,878 INFO L226 Difference]: Without dead ends: 26313 [2021-03-10 21:13:55,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:13:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26313 states. [2021-03-10 21:13:56,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26313 to 18677. [2021-03-10 21:13:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18677 states, 18676 states have (on average 2.569929321053759) internal successors, (47996), 18676 states have internal predecessors, (47996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18677 states to 18677 states and 47996 transitions. [2021-03-10 21:13:56,155 INFO L78 Accepts]: Start accepts. Automaton has 18677 states and 47996 transitions. Word has length 53 [2021-03-10 21:13:56,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:56,155 INFO L480 AbstractCegarLoop]: Abstraction has 18677 states and 47996 transitions. [2021-03-10 21:13:56,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 18677 states and 47996 transitions. [2021-03-10 21:13:56,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:56,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:56,164 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:56,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:56,365 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:56,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2138942461, now seen corresponding path program 110 times [2021-03-10 21:13:56,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:56,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647630524] [2021-03-10 21:13:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 96 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:56,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647630524] [2021-03-10 21:13:56,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319429685] [2021-03-10 21:13:56,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:56,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:56,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:56,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:56,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:56,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:56,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:13:56,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490157518] [2021-03-10 21:13:56,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:13:56,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:56,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:13:56,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:13:56,580 INFO L87 Difference]: Start difference. First operand 18677 states and 47996 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:57,046 INFO L93 Difference]: Finished difference Result 26827 states and 66301 transitions. [2021-03-10 21:13:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:13:57,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:57,129 INFO L225 Difference]: With dead ends: 26827 [2021-03-10 21:13:57,129 INFO L226 Difference]: Without dead ends: 26827 [2021-03-10 21:13:57,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:13:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-03-10 21:13:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 18702. [2021-03-10 21:13:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18702 states, 18701 states have (on average 2.5706646703384846) internal successors, (48074), 18701 states have internal predecessors, (48074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18702 states to 18702 states and 48074 transitions. [2021-03-10 21:13:57,377 INFO L78 Accepts]: Start accepts. Automaton has 18702 states and 48074 transitions. Word has length 53 [2021-03-10 21:13:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:57,377 INFO L480 AbstractCegarLoop]: Abstraction has 18702 states and 48074 transitions. [2021-03-10 21:13:57,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 18702 states and 48074 transitions. [2021-03-10 21:13:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:57,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:57,386 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:57,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-03-10 21:13:57,586 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:57,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:57,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1099655449, now seen corresponding path program 111 times [2021-03-10 21:13:57,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:57,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623641947] [2021-03-10 21:13:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 92 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:57,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623641947] [2021-03-10 21:13:57,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26994500] [2021-03-10 21:13:57,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:57,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 21:13:57,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:13:57,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:57,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:57,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-03-10 21:13:57,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053699803] [2021-03-10 21:13:57,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:57,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:57,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:57,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:57,873 INFO L87 Difference]: Start difference. First operand 18702 states and 48074 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:58,404 INFO L93 Difference]: Finished difference Result 21378 states and 53479 transitions. [2021-03-10 21:13:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:13:58,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:58,428 INFO L225 Difference]: With dead ends: 21378 [2021-03-10 21:13:58,428 INFO L226 Difference]: Without dead ends: 21378 [2021-03-10 21:13:58,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:13:58,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21378 states. [2021-03-10 21:13:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21378 to 17918. [2021-03-10 21:13:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17918 states, 17917 states have (on average 2.5676173466540155) internal successors, (46004), 17917 states have internal predecessors, (46004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17918 states to 17918 states and 46004 transitions. [2021-03-10 21:13:58,667 INFO L78 Accepts]: Start accepts. Automaton has 17918 states and 46004 transitions. Word has length 53 [2021-03-10 21:13:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:58,667 INFO L480 AbstractCegarLoop]: Abstraction has 17918 states and 46004 transitions. [2021-03-10 21:13:58,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 17918 states and 46004 transitions. [2021-03-10 21:13:58,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:58,675 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:58,676 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:58,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-03-10 21:13:58,876 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2113323565, now seen corresponding path program 206 times [2021-03-10 21:13:58,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:58,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834082970] [2021-03-10 21:13:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:59,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834082970] [2021-03-10 21:13:59,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834618622] [2021-03-10 21:13:59,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:59,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:59,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:59,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:59,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:59,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:59,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 21:13:59,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905285744] [2021-03-10 21:13:59,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:13:59,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:59,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:13:59,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:59,121 INFO L87 Difference]: Start difference. First operand 17918 states and 46004 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:59,416 INFO L93 Difference]: Finished difference Result 20580 states and 51574 transitions. [2021-03-10 21:13:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:13:59,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:13:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:59,437 INFO L225 Difference]: With dead ends: 20580 [2021-03-10 21:13:59,437 INFO L226 Difference]: Without dead ends: 20526 [2021-03-10 21:13:59,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:13:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20526 states. [2021-03-10 21:13:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20526 to 17927. [2021-03-10 21:13:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.5668303023541226) internal successors, (46013), 17926 states have internal predecessors, (46013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 46013 transitions. [2021-03-10 21:13:59,674 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 46013 transitions. Word has length 53 [2021-03-10 21:13:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:59,674 INFO L480 AbstractCegarLoop]: Abstraction has 17927 states and 46013 transitions. [2021-03-10 21:13:59,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 46013 transitions. [2021-03-10 21:13:59,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:13:59,684 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:59,684 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:59,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-03-10 21:13:59,884 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2078851807, now seen corresponding path program 207 times [2021-03-10 21:13:59,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:59,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430299566] [2021-03-10 21:13:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:00,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430299566] [2021-03-10 21:14:00,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114109910] [2021-03-10 21:14:00,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:00,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 21:14:00,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:00,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:00,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 21:14:00,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949964727] [2021-03-10 21:14:00,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:00,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:00,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:00,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:00,141 INFO L87 Difference]: Start difference. First operand 17927 states and 46013 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:00,655 INFO L93 Difference]: Finished difference Result 20642 states and 52127 transitions. [2021-03-10 21:14:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:14:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:00,677 INFO L225 Difference]: With dead ends: 20642 [2021-03-10 21:14:00,677 INFO L226 Difference]: Without dead ends: 20642 [2021-03-10 21:14:00,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:14:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20642 states. [2021-03-10 21:14:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20642 to 18179. [2021-03-10 21:14:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18179 states, 18178 states have (on average 2.576411046319727) internal successors, (46834), 18178 states have internal predecessors, (46834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18179 states to 18179 states and 46834 transitions. [2021-03-10 21:14:00,918 INFO L78 Accepts]: Start accepts. Automaton has 18179 states and 46834 transitions. Word has length 53 [2021-03-10 21:14:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:00,918 INFO L480 AbstractCegarLoop]: Abstraction has 18179 states and 46834 transitions. [2021-03-10 21:14:00,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 18179 states and 46834 transitions. [2021-03-10 21:14:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:00,928 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:00,928 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:01,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-03-10 21:14:01,128 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1980297346, now seen corresponding path program 112 times [2021-03-10 21:14:01,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:01,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823043191] [2021-03-10 21:14:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:01,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823043191] [2021-03-10 21:14:01,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610928269] [2021-03-10 21:14:01,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:01,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:01,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:01,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:01,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:01,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:01,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:14:01,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038825604] [2021-03-10 21:14:01,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:01,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:01,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:01,385 INFO L87 Difference]: Start difference. First operand 18179 states and 46834 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:02,115 INFO L93 Difference]: Finished difference Result 28924 states and 71812 transitions. [2021-03-10 21:14:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:14:02,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:02,149 INFO L225 Difference]: With dead ends: 28924 [2021-03-10 21:14:02,149 INFO L226 Difference]: Without dead ends: 28730 [2021-03-10 21:14:02,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:14:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28730 states. [2021-03-10 21:14:02,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28730 to 17894. [2021-03-10 21:14:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17894 states, 17893 states have (on average 2.572570278880009) internal successors, (46031), 17893 states have internal predecessors, (46031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17894 states to 17894 states and 46031 transitions. [2021-03-10 21:14:02,429 INFO L78 Accepts]: Start accepts. Automaton has 17894 states and 46031 transitions. Word has length 53 [2021-03-10 21:14:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:02,429 INFO L480 AbstractCegarLoop]: Abstraction has 17894 states and 46031 transitions. [2021-03-10 21:14:02,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17894 states and 46031 transitions. [2021-03-10 21:14:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:02,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:02,439 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:02,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,639 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1264685238, now seen corresponding path program 208 times [2021-03-10 21:14:02,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:02,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226484395] [2021-03-10 21:14:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:02,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226484395] [2021-03-10 21:14:02,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230377618] [2021-03-10 21:14:02,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:02,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:02,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:02,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:03,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:03,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-03-10 21:14:03,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372157713] [2021-03-10 21:14:03,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:03,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:03,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:03,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:03,023 INFO L87 Difference]: Start difference. First operand 17894 states and 46031 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:03,985 INFO L93 Difference]: Finished difference Result 18280 states and 46750 transitions. [2021-03-10 21:14:03,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:14:03,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:03,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:04,005 INFO L225 Difference]: With dead ends: 18280 [2021-03-10 21:14:04,006 INFO L226 Difference]: Without dead ends: 18120 [2021-03-10 21:14:04,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:14:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18120 states. [2021-03-10 21:14:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18120 to 17942. [2021-03-10 21:14:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17942 states, 17941 states have (on average 2.5672482024413354) internal successors, (46059), 17941 states have internal predecessors, (46059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17942 states to 17942 states and 46059 transitions. [2021-03-10 21:14:04,214 INFO L78 Accepts]: Start accepts. Automaton has 17942 states and 46059 transitions. Word has length 53 [2021-03-10 21:14:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:04,214 INFO L480 AbstractCegarLoop]: Abstraction has 17942 states and 46059 transitions. [2021-03-10 21:14:04,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 17942 states and 46059 transitions. [2021-03-10 21:14:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:04,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:04,223 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:04,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-03-10 21:14:04,424 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash -880609109, now seen corresponding path program 209 times [2021-03-10 21:14:04,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:04,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200114944] [2021-03-10 21:14:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:04,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200114944] [2021-03-10 21:14:04,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574764343] [2021-03-10 21:14:04,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:04,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:14:04,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:04,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:04,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 16 [2021-03-10 21:14:04,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077022822] [2021-03-10 21:14:04,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:04,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:04,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:04,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:04,748 INFO L87 Difference]: Start difference. First operand 17942 states and 46059 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:05,172 INFO L93 Difference]: Finished difference Result 21173 states and 53340 transitions. [2021-03-10 21:14:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:14:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:05,197 INFO L225 Difference]: With dead ends: 21173 [2021-03-10 21:14:05,197 INFO L226 Difference]: Without dead ends: 21173 [2021-03-10 21:14:05,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:14:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21173 states. [2021-03-10 21:14:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21173 to 18270. [2021-03-10 21:14:05,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18270 states, 18269 states have (on average 2.576605178170672) internal successors, (47072), 18269 states have internal predecessors, (47072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18270 states to 18270 states and 47072 transitions. [2021-03-10 21:14:05,443 INFO L78 Accepts]: Start accepts. Automaton has 18270 states and 47072 transitions. Word has length 53 [2021-03-10 21:14:05,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:05,443 INFO L480 AbstractCegarLoop]: Abstraction has 18270 states and 47072 transitions. [2021-03-10 21:14:05,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 18270 states and 47072 transitions. [2021-03-10 21:14:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:05,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:05,452 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:05,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable755,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:05,653 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2097202474, now seen corresponding path program 113 times [2021-03-10 21:14:05,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:05,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887037913] [2021-03-10 21:14:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:05,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887037913] [2021-03-10 21:14:05,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985922294] [2021-03-10 21:14:05,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:05,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:14:05,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:05,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:05,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:05,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:05,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:14:05,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450637820] [2021-03-10 21:14:05,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:05,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:05,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:05,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:05,896 INFO L87 Difference]: Start difference. First operand 18270 states and 47072 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:06,582 INFO L93 Difference]: Finished difference Result 27152 states and 67590 transitions. [2021-03-10 21:14:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:14:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:06,613 INFO L225 Difference]: With dead ends: 27152 [2021-03-10 21:14:06,613 INFO L226 Difference]: Without dead ends: 27100 [2021-03-10 21:14:06,613 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:14:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27100 states. [2021-03-10 21:14:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27100 to 18029. [2021-03-10 21:14:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18029 states, 18028 states have (on average 2.5790991790548037) internal successors, (46496), 18028 states have internal predecessors, (46496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18029 states to 18029 states and 46496 transitions. [2021-03-10 21:14:06,879 INFO L78 Accepts]: Start accepts. Automaton has 18029 states and 46496 transitions. Word has length 53 [2021-03-10 21:14:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:06,879 INFO L480 AbstractCegarLoop]: Abstraction has 18029 states and 46496 transitions. [2021-03-10 21:14:06,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 18029 states and 46496 transitions. [2021-03-10 21:14:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:06,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:06,888 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:07,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-03-10 21:14:07,088 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash -521513674, now seen corresponding path program 210 times [2021-03-10 21:14:07,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:07,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594758408] [2021-03-10 21:14:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:07,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594758408] [2021-03-10 21:14:07,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910177860] [2021-03-10 21:14:07,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:07,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 21:14:07,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:07,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:07,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:07,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:07,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:14:07,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903101801] [2021-03-10 21:14:07,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:07,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:07,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:07,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:07,433 INFO L87 Difference]: Start difference. First operand 18029 states and 46496 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:08,179 INFO L93 Difference]: Finished difference Result 18428 states and 47203 transitions. [2021-03-10 21:14:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:14:08,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:08,199 INFO L225 Difference]: With dead ends: 18428 [2021-03-10 21:14:08,200 INFO L226 Difference]: Without dead ends: 18304 [2021-03-10 21:14:08,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-03-10 21:14:08,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 18002. [2021-03-10 21:14:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18002 states, 18001 states have (on average 2.5769123937559026) internal successors, (46387), 18001 states have internal predecessors, (46387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18002 states to 18002 states and 46387 transitions. [2021-03-10 21:14:08,452 INFO L78 Accepts]: Start accepts. Automaton has 18002 states and 46387 transitions. Word has length 53 [2021-03-10 21:14:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:08,452 INFO L480 AbstractCegarLoop]: Abstraction has 18002 states and 46387 transitions. [2021-03-10 21:14:08,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 18002 states and 46387 transitions. [2021-03-10 21:14:08,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:08,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:08,461 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:08,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:08,661 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:08,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:08,662 INFO L82 PathProgramCache]: Analyzing trace with hash -290292687, now seen corresponding path program 114 times [2021-03-10 21:14:08,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:08,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699691472] [2021-03-10 21:14:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:08,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699691472] [2021-03-10 21:14:08,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900513693] [2021-03-10 21:14:08,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:08,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:14:08,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:08,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:08,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:08,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:08,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-03-10 21:14:08,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479298856] [2021-03-10 21:14:08,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:08,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:08,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:08,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:08,903 INFO L87 Difference]: Start difference. First operand 18002 states and 46387 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:09,221 INFO L93 Difference]: Finished difference Result 20809 states and 52046 transitions. [2021-03-10 21:14:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:14:09,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:09,245 INFO L225 Difference]: With dead ends: 20809 [2021-03-10 21:14:09,245 INFO L226 Difference]: Without dead ends: 20759 [2021-03-10 21:14:09,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:14:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20759 states. [2021-03-10 21:14:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20759 to 17538. [2021-03-10 21:14:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17538 states, 17537 states have (on average 2.5746706962422308) internal successors, (45152), 17537 states have internal predecessors, (45152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17538 states to 17538 states and 45152 transitions. [2021-03-10 21:14:09,472 INFO L78 Accepts]: Start accepts. Automaton has 17538 states and 45152 transitions. Word has length 53 [2021-03-10 21:14:09,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:09,472 INFO L480 AbstractCegarLoop]: Abstraction has 17538 states and 45152 transitions. [2021-03-10 21:14:09,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 17538 states and 45152 transitions. [2021-03-10 21:14:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:09,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:09,480 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:09,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:09,681 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:09,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1595716629, now seen corresponding path program 211 times [2021-03-10 21:14:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:09,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533899761] [2021-03-10 21:14:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:09,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533899761] [2021-03-10 21:14:09,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782197775] [2021-03-10 21:14:09,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:09,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:09,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:09,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:09,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:14:09,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567642157] [2021-03-10 21:14:09,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:09,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:09,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:09,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:09,904 INFO L87 Difference]: Start difference. First operand 17538 states and 45152 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:10,250 INFO L93 Difference]: Finished difference Result 21028 states and 53064 transitions. [2021-03-10 21:14:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:14:10,251 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:10,275 INFO L225 Difference]: With dead ends: 21028 [2021-03-10 21:14:10,275 INFO L226 Difference]: Without dead ends: 21028 [2021-03-10 21:14:10,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:14:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2021-03-10 21:14:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 17538. [2021-03-10 21:14:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17538 states, 17537 states have (on average 2.582083594685522) internal successors, (45282), 17537 states have internal predecessors, (45282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:10,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17538 states to 17538 states and 45282 transitions. [2021-03-10 21:14:10,514 INFO L78 Accepts]: Start accepts. Automaton has 17538 states and 45282 transitions. Word has length 53 [2021-03-10 21:14:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:10,514 INFO L480 AbstractCegarLoop]: Abstraction has 17538 states and 45282 transitions. [2021-03-10 21:14:10,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 17538 states and 45282 transitions. [2021-03-10 21:14:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:10,523 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:10,523 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:10,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-03-10 21:14:10,724 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:10,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2006879870, now seen corresponding path program 115 times [2021-03-10 21:14:10,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:10,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391971681] [2021-03-10 21:14:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:10,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391971681] [2021-03-10 21:14:10,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573123638] [2021-03-10 21:14:10,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:10,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:10,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:14:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505546876] [2021-03-10 21:14:10,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:10,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:10,952 INFO L87 Difference]: Start difference. First operand 17538 states and 45282 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:11,592 INFO L93 Difference]: Finished difference Result 22570 states and 56695 transitions. [2021-03-10 21:14:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:14:11,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:11,618 INFO L225 Difference]: With dead ends: 22570 [2021-03-10 21:14:11,618 INFO L226 Difference]: Without dead ends: 22556 [2021-03-10 21:14:11,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:14:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22556 states. [2021-03-10 21:14:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22556 to 17478. [2021-03-10 21:14:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17478 states, 17477 states have (on average 2.584368026549179) internal successors, (45167), 17477 states have internal predecessors, (45167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17478 states to 17478 states and 45167 transitions. [2021-03-10 21:14:11,930 INFO L78 Accepts]: Start accepts. Automaton has 17478 states and 45167 transitions. Word has length 53 [2021-03-10 21:14:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:11,930 INFO L480 AbstractCegarLoop]: Abstraction has 17478 states and 45167 transitions. [2021-03-10 21:14:11,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 17478 states and 45167 transitions. [2021-03-10 21:14:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:11,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:11,940 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:12,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:12,140 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:12,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2126035330, now seen corresponding path program 212 times [2021-03-10 21:14:12,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:12,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189086700] [2021-03-10 21:14:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:12,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189086700] [2021-03-10 21:14:12,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868820765] [2021-03-10 21:14:12,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:12,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:12,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:12,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:12,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:12,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:12,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:14:12,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362425532] [2021-03-10 21:14:12,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:14:12,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:12,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:14:12,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:12,487 INFO L87 Difference]: Start difference. First operand 17478 states and 45167 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:13,256 INFO L93 Difference]: Finished difference Result 17642 states and 45426 transitions. [2021-03-10 21:14:13,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:14:13,257 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:13,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:13,275 INFO L225 Difference]: With dead ends: 17642 [2021-03-10 21:14:13,275 INFO L226 Difference]: Without dead ends: 17589 [2021-03-10 21:14:13,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17589 states. [2021-03-10 21:14:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17589 to 17469. [2021-03-10 21:14:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17469 states, 17468 states have (on average 2.5834669109228305) internal successors, (45128), 17468 states have internal predecessors, (45128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17469 states to 17469 states and 45128 transitions. [2021-03-10 21:14:13,485 INFO L78 Accepts]: Start accepts. Automaton has 17469 states and 45128 transitions. Word has length 53 [2021-03-10 21:14:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:13,486 INFO L480 AbstractCegarLoop]: Abstraction has 17469 states and 45128 transitions. [2021-03-10 21:14:13,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 17469 states and 45128 transitions. [2021-03-10 21:14:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:13,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:13,494 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:13,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-03-10 21:14:13,694 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash 145337653, now seen corresponding path program 116 times [2021-03-10 21:14:13,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:13,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392780636] [2021-03-10 21:14:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:13,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392780636] [2021-03-10 21:14:13,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447263686] [2021-03-10 21:14:13,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:13,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:13,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:13,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:13,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:13,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:13,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-03-10 21:14:13,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727754000] [2021-03-10 21:14:13,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:13,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:13,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:13,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:13,921 INFO L87 Difference]: Start difference. First operand 17469 states and 45128 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:14,206 INFO L93 Difference]: Finished difference Result 19626 states and 49403 transitions. [2021-03-10 21:14:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:14:14,207 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:14,228 INFO L225 Difference]: With dead ends: 19626 [2021-03-10 21:14:14,228 INFO L226 Difference]: Without dead ends: 19542 [2021-03-10 21:14:14,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19542 states. [2021-03-10 21:14:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19542 to 15929. [2021-03-10 21:14:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15929 states, 15928 states have (on average 2.5727021597187343) internal successors, (40978), 15928 states have internal predecessors, (40978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15929 states to 15929 states and 40978 transitions. [2021-03-10 21:14:14,445 INFO L78 Accepts]: Start accepts. Automaton has 15929 states and 40978 transitions. Word has length 53 [2021-03-10 21:14:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:14,445 INFO L480 AbstractCegarLoop]: Abstraction has 15929 states and 40978 transitions. [2021-03-10 21:14:14,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 15929 states and 40978 transitions. [2021-03-10 21:14:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:14,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:14,454 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:14,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-03-10 21:14:14,654 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:14,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:14,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1808139831, now seen corresponding path program 213 times [2021-03-10 21:14:14,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:14,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999304335] [2021-03-10 21:14:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:14,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999304335] [2021-03-10 21:14:14,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043197634] [2021-03-10 21:14:14,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:14,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:14:14,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:14,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:14,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:14,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:14:14,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362149546] [2021-03-10 21:14:14,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:14,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:14,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:14,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:14,887 INFO L87 Difference]: Start difference. First operand 15929 states and 40978 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:15,187 INFO L93 Difference]: Finished difference Result 19428 states and 48803 transitions. [2021-03-10 21:14:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:15,188 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:15,208 INFO L225 Difference]: With dead ends: 19428 [2021-03-10 21:14:15,209 INFO L226 Difference]: Without dead ends: 19428 [2021-03-10 21:14:15,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19428 states. [2021-03-10 21:14:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19428 to 16290. [2021-03-10 21:14:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16290 states, 16289 states have (on average 2.5829087114003313) internal successors, (42073), 16289 states have internal predecessors, (42073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16290 states to 16290 states and 42073 transitions. [2021-03-10 21:14:15,429 INFO L78 Accepts]: Start accepts. Automaton has 16290 states and 42073 transitions. Word has length 53 [2021-03-10 21:14:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:15,430 INFO L480 AbstractCegarLoop]: Abstraction has 16290 states and 42073 transitions. [2021-03-10 21:14:15,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 16290 states and 42073 transitions. [2021-03-10 21:14:15,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:15,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:15,438 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:15,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-03-10 21:14:15,643 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:15,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:15,643 INFO L82 PathProgramCache]: Analyzing trace with hash -933239766, now seen corresponding path program 117 times [2021-03-10 21:14:15,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:15,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622546906] [2021-03-10 21:14:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:15,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622546906] [2021-03-10 21:14:15,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122397062] [2021-03-10 21:14:15,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:15,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:14:15,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:15,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:15,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:15,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:15,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:14:15,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870863319] [2021-03-10 21:14:15,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:15,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:15,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:15,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:15,928 INFO L87 Difference]: Start difference. First operand 16290 states and 42073 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:16,514 INFO L93 Difference]: Finished difference Result 19020 states and 48119 transitions. [2021-03-10 21:14:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:14:16,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:16,535 INFO L225 Difference]: With dead ends: 19020 [2021-03-10 21:14:16,535 INFO L226 Difference]: Without dead ends: 19006 [2021-03-10 21:14:16,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:14:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19006 states. [2021-03-10 21:14:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19006 to 16312. [2021-03-10 21:14:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16312 states, 16311 states have (on average 2.583287352093679) internal successors, (42136), 16311 states have internal predecessors, (42136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16312 states to 16312 states and 42136 transitions. [2021-03-10 21:14:16,737 INFO L78 Accepts]: Start accepts. Automaton has 16312 states and 42136 transitions. Word has length 53 [2021-03-10 21:14:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:16,737 INFO L480 AbstractCegarLoop]: Abstraction has 16312 states and 42136 transitions. [2021-03-10 21:14:16,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 16312 states and 42136 transitions. [2021-03-10 21:14:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:16,746 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:16,746 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:16,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-03-10 21:14:16,946 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:16,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:16,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1110130710, now seen corresponding path program 214 times [2021-03-10 21:14:16,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:16,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892054348] [2021-03-10 21:14:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:17,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892054348] [2021-03-10 21:14:17,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69990678] [2021-03-10 21:14:17,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:17,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:17,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:17,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:17,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:17,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 21:14:17,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161829069] [2021-03-10 21:14:17,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:17,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:17,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:17,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:17,272 INFO L87 Difference]: Start difference. First operand 16312 states and 42136 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:17,778 INFO L93 Difference]: Finished difference Result 16369 states and 42228 transitions. [2021-03-10 21:14:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:17,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:17,796 INFO L225 Difference]: With dead ends: 16369 [2021-03-10 21:14:17,797 INFO L226 Difference]: Without dead ends: 16331 [2021-03-10 21:14:17,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-03-10 21:14:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 16303. [2021-03-10 21:14:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16303 states, 16302 states have (on average 2.5830572935836096) internal successors, (42109), 16302 states have internal predecessors, (42109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 42109 transitions. [2021-03-10 21:14:17,980 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 42109 transitions. Word has length 53 [2021-03-10 21:14:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:17,980 INFO L480 AbstractCegarLoop]: Abstraction has 16303 states and 42109 transitions. [2021-03-10 21:14:17,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 42109 transitions. [2021-03-10 21:14:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:17,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:17,988 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:18,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:18,188 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1855932587, now seen corresponding path program 215 times [2021-03-10 21:14:18,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:18,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739111862] [2021-03-10 21:14:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:18,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739111862] [2021-03-10 21:14:18,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816652504] [2021-03-10 21:14:18,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:18,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:14:18,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:18,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:18,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:18,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:18,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-03-10 21:14:18,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721294275] [2021-03-10 21:14:18,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:18,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:18,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:18,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:18,417 INFO L87 Difference]: Start difference. First operand 16303 states and 42109 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:18,766 INFO L93 Difference]: Finished difference Result 20064 states and 50446 transitions. [2021-03-10 21:14:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:14:18,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:18,790 INFO L225 Difference]: With dead ends: 20064 [2021-03-10 21:14:18,790 INFO L226 Difference]: Without dead ends: 20064 [2021-03-10 21:14:18,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20064 states. [2021-03-10 21:14:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20064 to 16702. [2021-03-10 21:14:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16702 states, 16701 states have (on average 2.5931381354409915) internal successors, (43308), 16701 states have internal predecessors, (43308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16702 states to 16702 states and 43308 transitions. [2021-03-10 21:14:19,020 INFO L78 Accepts]: Start accepts. Automaton has 16702 states and 43308 transitions. Word has length 53 [2021-03-10 21:14:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:19,020 INFO L480 AbstractCegarLoop]: Abstraction has 16702 states and 43308 transitions. [2021-03-10 21:14:19,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 16702 states and 43308 transitions. [2021-03-10 21:14:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:19,029 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:19,029 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:19,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-03-10 21:14:19,229 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1668199042, now seen corresponding path program 118 times [2021-03-10 21:14:19,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:19,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376035142] [2021-03-10 21:14:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:19,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376035142] [2021-03-10 21:14:19,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853097811] [2021-03-10 21:14:19,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:19,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:19,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:19,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:14:19,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:19,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:14:19,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-03-10 21:14:19,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:19,459 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-03-10 21:14:19,460 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:14:19,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:19,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-03-10 21:14:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:19,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:19,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 21:14:19,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776342377] [2021-03-10 21:14:19,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:19,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:19,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:19,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:19,468 INFO L87 Difference]: Start difference. First operand 16702 states and 43308 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:20,374 INFO L93 Difference]: Finished difference Result 20310 states and 51154 transitions. [2021-03-10 21:14:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:14:20,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:20,396 INFO L225 Difference]: With dead ends: 20310 [2021-03-10 21:14:20,396 INFO L226 Difference]: Without dead ends: 20248 [2021-03-10 21:14:20,396 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20248 states. [2021-03-10 21:14:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20248 to 17707. [2021-03-10 21:14:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17707 states, 17706 states have (on average 2.5786738958545126) internal successors, (45658), 17706 states have internal predecessors, (45658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17707 states to 17707 states and 45658 transitions. [2021-03-10 21:14:20,631 INFO L78 Accepts]: Start accepts. Automaton has 17707 states and 45658 transitions. Word has length 53 [2021-03-10 21:14:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:20,631 INFO L480 AbstractCegarLoop]: Abstraction has 17707 states and 45658 transitions. [2021-03-10 21:14:20,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 17707 states and 45658 transitions. [2021-03-10 21:14:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:20,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:20,640 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:20,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable777,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:20,840 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:20,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:20,840 INFO L82 PathProgramCache]: Analyzing trace with hash 34902658, now seen corresponding path program 216 times [2021-03-10 21:14:20,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:20,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385852591] [2021-03-10 21:14:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:20,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385852591] [2021-03-10 21:14:20,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135828149] [2021-03-10 21:14:20,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:20,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:14:20,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:20,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:20,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:21,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:21,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-10 21:14:21,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115168316] [2021-03-10 21:14:21,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:21,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:21,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:21,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:21,106 INFO L87 Difference]: Start difference. First operand 17707 states and 45658 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:21,553 INFO L93 Difference]: Finished difference Result 17780 states and 45766 transitions. [2021-03-10 21:14:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:21,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:21,573 INFO L225 Difference]: With dead ends: 17780 [2021-03-10 21:14:21,573 INFO L226 Difference]: Without dead ends: 17757 [2021-03-10 21:14:21,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17757 states. [2021-03-10 21:14:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17757 to 17698. [2021-03-10 21:14:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17698 states, 17697 states have (on average 2.5786856529355258) internal successors, (45635), 17697 states have internal predecessors, (45635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17698 states to 17698 states and 45635 transitions. [2021-03-10 21:14:21,775 INFO L78 Accepts]: Start accepts. Automaton has 17698 states and 45635 transitions. Word has length 53 [2021-03-10 21:14:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:21,775 INFO L480 AbstractCegarLoop]: Abstraction has 17698 states and 45635 transitions. [2021-03-10 21:14:21,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 17698 states and 45635 transitions. [2021-03-10 21:14:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:21,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:21,784 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:21,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable778,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:21,984 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:21,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:21,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1588490357, now seen corresponding path program 119 times [2021-03-10 21:14:21,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:21,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602949871] [2021-03-10 21:14:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:22,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602949871] [2021-03-10 21:14:22,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705237123] [2021-03-10 21:14:22,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:22,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:14:22,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:22,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:22,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:22,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:22,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-03-10 21:14:22,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897463441] [2021-03-10 21:14:22,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:14:22,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:22,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:14:22,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:14:22,241 INFO L87 Difference]: Start difference. First operand 17698 states and 45635 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:22,634 INFO L93 Difference]: Finished difference Result 19519 states and 49175 transitions. [2021-03-10 21:14:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:14:22,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:22,656 INFO L225 Difference]: With dead ends: 19519 [2021-03-10 21:14:22,656 INFO L226 Difference]: Without dead ends: 19497 [2021-03-10 21:14:22,656 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19497 states. [2021-03-10 21:14:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19497 to 17644. [2021-03-10 21:14:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 17643 states have (on average 2.579833361673185) internal successors, (45516), 17643 states have internal predecessors, (45516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 45516 transitions. [2021-03-10 21:14:22,880 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 45516 transitions. Word has length 53 [2021-03-10 21:14:22,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:22,880 INFO L480 AbstractCegarLoop]: Abstraction has 17644 states and 45516 transitions. [2021-03-10 21:14:22,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,880 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 45516 transitions. [2021-03-10 21:14:22,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:22,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:22,889 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:23,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable779 [2021-03-10 21:14:23,089 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1668467447, now seen corresponding path program 217 times [2021-03-10 21:14:23,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:23,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486578568] [2021-03-10 21:14:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:23,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486578568] [2021-03-10 21:14:23,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788247017] [2021-03-10 21:14:23,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:23,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:23,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:23,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:23,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:14:23,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189261128] [2021-03-10 21:14:23,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:23,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:23,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:23,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:23,290 INFO L87 Difference]: Start difference. First operand 17644 states and 45516 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:23,493 INFO L93 Difference]: Finished difference Result 22069 states and 55206 transitions. [2021-03-10 21:14:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:23,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:23,518 INFO L225 Difference]: With dead ends: 22069 [2021-03-10 21:14:23,518 INFO L226 Difference]: Without dead ends: 22069 [2021-03-10 21:14:23,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:23,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22069 states. [2021-03-10 21:14:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22069 to 18287. [2021-03-10 21:14:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18287 states, 18286 states have (on average 2.592201684348682) internal successors, (47401), 18286 states have internal predecessors, (47401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18287 states to 18287 states and 47401 transitions. [2021-03-10 21:14:23,793 INFO L78 Accepts]: Start accepts. Automaton has 18287 states and 47401 transitions. Word has length 53 [2021-03-10 21:14:23,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:23,793 INFO L480 AbstractCegarLoop]: Abstraction has 18287 states and 47401 transitions. [2021-03-10 21:14:23,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 18287 states and 47401 transitions. [2021-03-10 21:14:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:23,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:23,801 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:24,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-03-10 21:14:24,002 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1430405930, now seen corresponding path program 120 times [2021-03-10 21:14:24,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:24,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476537003] [2021-03-10 21:14:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:24,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476537003] [2021-03-10 21:14:24,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424084552] [2021-03-10 21:14:24,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:24,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:14:24,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:24,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:24,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:24,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:24,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:14:24,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874863337] [2021-03-10 21:14:24,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:24,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:24,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:24,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:24,223 INFO L87 Difference]: Start difference. First operand 18287 states and 47401 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:24,763 INFO L93 Difference]: Finished difference Result 20912 states and 52894 transitions. [2021-03-10 21:14:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:14:24,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:24,786 INFO L225 Difference]: With dead ends: 20912 [2021-03-10 21:14:24,787 INFO L226 Difference]: Without dead ends: 20869 [2021-03-10 21:14:24,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20869 states. [2021-03-10 21:14:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20869 to 18935. [2021-03-10 21:14:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18935 states, 18934 states have (on average 2.580014788211683) internal successors, (48850), 18934 states have internal predecessors, (48850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18935 states to 18935 states and 48850 transitions. [2021-03-10 21:14:25,022 INFO L78 Accepts]: Start accepts. Automaton has 18935 states and 48850 transitions. Word has length 53 [2021-03-10 21:14:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:25,023 INFO L480 AbstractCegarLoop]: Abstraction has 18935 states and 48850 transitions. [2021-03-10 21:14:25,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,023 INFO L276 IsEmpty]: Start isEmpty. Operand 18935 states and 48850 transitions. [2021-03-10 21:14:25,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:25,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:25,032 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:25,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-03-10 21:14:25,232 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:25,232 INFO L82 PathProgramCache]: Analyzing trace with hash -123290927, now seen corresponding path program 218 times [2021-03-10 21:14:25,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:25,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157037731] [2021-03-10 21:14:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:25,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157037731] [2021-03-10 21:14:25,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094002171] [2021-03-10 21:14:25,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:25,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:25,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:25,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:25,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:25,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:25,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:14:25,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371822976] [2021-03-10 21:14:25,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:25,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:25,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:25,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:25,429 INFO L87 Difference]: Start difference. First operand 18935 states and 48850 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:25,626 INFO L93 Difference]: Finished difference Result 22353 states and 55782 transitions. [2021-03-10 21:14:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:25,627 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:25,652 INFO L225 Difference]: With dead ends: 22353 [2021-03-10 21:14:25,652 INFO L226 Difference]: Without dead ends: 22350 [2021-03-10 21:14:25,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22350 states. [2021-03-10 21:14:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22350 to 18934. [2021-03-10 21:14:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18934 states, 18933 states have (on average 2.579781334178419) internal successors, (48843), 18933 states have internal predecessors, (48843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18934 states to 18934 states and 48843 transitions. [2021-03-10 21:14:25,901 INFO L78 Accepts]: Start accepts. Automaton has 18934 states and 48843 transitions. Word has length 53 [2021-03-10 21:14:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:25,901 INFO L480 AbstractCegarLoop]: Abstraction has 18934 states and 48843 transitions. [2021-03-10 21:14:25,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 18934 states and 48843 transitions. [2021-03-10 21:14:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:25,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:25,910 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:26,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-03-10 21:14:26,111 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:26,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:26,111 INFO L82 PathProgramCache]: Analyzing trace with hash 83771639, now seen corresponding path program 219 times [2021-03-10 21:14:26,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:26,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556871173] [2021-03-10 21:14:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:26,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556871173] [2021-03-10 21:14:26,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431282318] [2021-03-10 21:14:26,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:26,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:14:26,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:26,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:26,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:14:26,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333390407] [2021-03-10 21:14:26,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:26,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:26,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:26,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:26,306 INFO L87 Difference]: Start difference. First operand 18934 states and 48843 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:26,491 INFO L93 Difference]: Finished difference Result 22398 states and 56318 transitions. [2021-03-10 21:14:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:26,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:26,517 INFO L225 Difference]: With dead ends: 22398 [2021-03-10 21:14:26,517 INFO L226 Difference]: Without dead ends: 22386 [2021-03-10 21:14:26,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22386 states. [2021-03-10 21:14:26,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22386 to 18934. [2021-03-10 21:14:26,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18934 states, 18933 states have (on average 2.5794644271906195) internal successors, (48837), 18933 states have internal predecessors, (48837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18934 states to 18934 states and 48837 transitions. [2021-03-10 21:14:26,821 INFO L78 Accepts]: Start accepts. Automaton has 18934 states and 48837 transitions. Word has length 53 [2021-03-10 21:14:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:26,821 INFO L480 AbstractCegarLoop]: Abstraction has 18934 states and 48837 transitions. [2021-03-10 21:14:26,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 18934 states and 48837 transitions. [2021-03-10 21:14:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:26,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:26,830 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:27,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:27,031 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:27,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1364228374, now seen corresponding path program 220 times [2021-03-10 21:14:27,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:27,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865992687] [2021-03-10 21:14:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:27,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865992687] [2021-03-10 21:14:27,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050518713] [2021-03-10 21:14:27,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:27,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:27,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:27,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:27,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:27,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:14:27,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691493403] [2021-03-10 21:14:27,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:27,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:27,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:27,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:27,251 INFO L87 Difference]: Start difference. First operand 18934 states and 48837 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:27,907 INFO L93 Difference]: Finished difference Result 20196 states and 51279 transitions. [2021-03-10 21:14:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:14:27,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:27,928 INFO L225 Difference]: With dead ends: 20196 [2021-03-10 21:14:27,929 INFO L226 Difference]: Without dead ends: 20055 [2021-03-10 21:14:27,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20055 states. [2021-03-10 21:14:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20055 to 18860. [2021-03-10 21:14:28,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18860 states, 18859 states have (on average 2.5767007794686885) internal successors, (48594), 18859 states have internal predecessors, (48594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18860 states to 18860 states and 48594 transitions. [2021-03-10 21:14:28,170 INFO L78 Accepts]: Start accepts. Automaton has 18860 states and 48594 transitions. Word has length 53 [2021-03-10 21:14:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:28,170 INFO L480 AbstractCegarLoop]: Abstraction has 18860 states and 48594 transitions. [2021-03-10 21:14:28,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 18860 states and 48594 transitions. [2021-03-10 21:14:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:28,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:28,180 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:28,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-03-10 21:14:28,380 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:28,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1696711889, now seen corresponding path program 221 times [2021-03-10 21:14:28,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:28,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018532921] [2021-03-10 21:14:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:28,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018532921] [2021-03-10 21:14:28,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24440227] [2021-03-10 21:14:28,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:28,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:14:28,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:28,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:28,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:28,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:28,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2021-03-10 21:14:28,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186890167] [2021-03-10 21:14:28,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:28,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:28,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:28,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:28,611 INFO L87 Difference]: Start difference. First operand 18860 states and 48594 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:28,893 INFO L93 Difference]: Finished difference Result 22503 states and 56431 transitions. [2021-03-10 21:14:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:14:28,894 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:28,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:28,919 INFO L225 Difference]: With dead ends: 22503 [2021-03-10 21:14:28,919 INFO L226 Difference]: Without dead ends: 22485 [2021-03-10 21:14:28,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:14:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22485 states. [2021-03-10 21:14:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22485 to 19058. [2021-03-10 21:14:29,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 19057 states have (on average 2.581938395340295) internal successors, (49204), 19057 states have internal predecessors, (49204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 49204 transitions. [2021-03-10 21:14:29,183 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 49204 transitions. Word has length 53 [2021-03-10 21:14:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:29,183 INFO L480 AbstractCegarLoop]: Abstraction has 19058 states and 49204 transitions. [2021-03-10 21:14:29,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 49204 transitions. [2021-03-10 21:14:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:29,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:29,193 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:29,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:29,393 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:29,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:29,393 INFO L82 PathProgramCache]: Analyzing trace with hash 705591991, now seen corresponding path program 222 times [2021-03-10 21:14:29,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:29,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271886558] [2021-03-10 21:14:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271886558] [2021-03-10 21:14:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063589618] [2021-03-10 21:14:29,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:29,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:14:29,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:29,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:29,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:29,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:29,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:14:29,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069180115] [2021-03-10 21:14:29,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:29,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:29,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:29,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:29,615 INFO L87 Difference]: Start difference. First operand 19058 states and 49204 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:29,851 INFO L93 Difference]: Finished difference Result 22370 states and 56114 transitions. [2021-03-10 21:14:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:29,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:29,876 INFO L225 Difference]: With dead ends: 22370 [2021-03-10 21:14:29,876 INFO L226 Difference]: Without dead ends: 22343 [2021-03-10 21:14:29,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22343 states. [2021-03-10 21:14:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22343 to 19058. [2021-03-10 21:14:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 19057 states have (on average 2.581780972870861) internal successors, (49201), 19057 states have internal predecessors, (49201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 49201 transitions. [2021-03-10 21:14:30,203 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 49201 transitions. Word has length 53 [2021-03-10 21:14:30,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:30,204 INFO L480 AbstractCegarLoop]: Abstraction has 19058 states and 49201 transitions. [2021-03-10 21:14:30,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,204 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 49201 transitions. [2021-03-10 21:14:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:30,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:30,214 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:30,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-03-10 21:14:30,414 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:30,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2142096623, now seen corresponding path program 223 times [2021-03-10 21:14:30,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:30,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867034802] [2021-03-10 21:14:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:30,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867034802] [2021-03-10 21:14:30,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348401732] [2021-03-10 21:14:30,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:30,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:30,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:30,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:30,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:14:30,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920173485] [2021-03-10 21:14:30,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:30,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:30,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:30,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:30,667 INFO L87 Difference]: Start difference. First operand 19058 states and 49201 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:30,937 INFO L93 Difference]: Finished difference Result 22478 states and 56307 transitions. [2021-03-10 21:14:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:30,964 INFO L225 Difference]: With dead ends: 22478 [2021-03-10 21:14:30,964 INFO L226 Difference]: Without dead ends: 22442 [2021-03-10 21:14:30,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22442 states. [2021-03-10 21:14:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22442 to 19058. [2021-03-10 21:14:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 19057 states have (on average 2.581623550401427) internal successors, (49198), 19057 states have internal predecessors, (49198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 49198 transitions. [2021-03-10 21:14:31,234 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 49198 transitions. Word has length 53 [2021-03-10 21:14:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:31,234 INFO L480 AbstractCegarLoop]: Abstraction has 19058 states and 49198 transitions. [2021-03-10 21:14:31,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 49198 transitions. [2021-03-10 21:14:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:31,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:31,244 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:31,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:31,445 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash 855401591, now seen corresponding path program 224 times [2021-03-10 21:14:31,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:31,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908958977] [2021-03-10 21:14:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:31,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908958977] [2021-03-10 21:14:31,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071291511] [2021-03-10 21:14:31,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:31,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:31,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:31,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:31,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 21:14:31,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009043076] [2021-03-10 21:14:31,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:31,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:31,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:31,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:31,725 INFO L87 Difference]: Start difference. First operand 19058 states and 49198 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:32,035 INFO L93 Difference]: Finished difference Result 22655 states and 56627 transitions. [2021-03-10 21:14:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:14:32,036 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:32,063 INFO L225 Difference]: With dead ends: 22655 [2021-03-10 21:14:32,063 INFO L226 Difference]: Without dead ends: 22610 [2021-03-10 21:14:32,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:14:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22610 states. [2021-03-10 21:14:32,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22610 to 19058. [2021-03-10 21:14:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 19057 states have (on average 2.5814661279319937) internal successors, (49195), 19057 states have internal predecessors, (49195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 49195 transitions. [2021-03-10 21:14:32,366 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 49195 transitions. Word has length 53 [2021-03-10 21:14:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:32,366 INFO L480 AbstractCegarLoop]: Abstraction has 19058 states and 49195 transitions. [2021-03-10 21:14:32,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 49195 transitions. [2021-03-10 21:14:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:32,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:32,375 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:32,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,390 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:32,576 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:32,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1635323567, now seen corresponding path program 225 times [2021-03-10 21:14:32,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:32,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423556820] [2021-03-10 21:14:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:32,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423556820] [2021-03-10 21:14:32,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085656181] [2021-03-10 21:14:32,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:32,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:14:32,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:32,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:32,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 21:14:32,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560308724] [2021-03-10 21:14:32,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:14:32,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:32,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:14:32,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:14:32,841 INFO L87 Difference]: Start difference. First operand 19058 states and 49195 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:33,181 INFO L93 Difference]: Finished difference Result 22943 states and 57150 transitions. [2021-03-10 21:14:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:14:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:33,206 INFO L225 Difference]: With dead ends: 22943 [2021-03-10 21:14:33,207 INFO L226 Difference]: Without dead ends: 22889 [2021-03-10 21:14:33,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:14:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22889 states. [2021-03-10 21:14:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22889 to 19058. [2021-03-10 21:14:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 19057 states have (on average 2.58130870546256) internal successors, (49192), 19057 states have internal predecessors, (49192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 49192 transitions. [2021-03-10 21:14:33,536 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 49192 transitions. Word has length 53 [2021-03-10 21:14:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:33,536 INFO L480 AbstractCegarLoop]: Abstraction has 19058 states and 49192 transitions. [2021-03-10 21:14:33,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 49192 transitions. [2021-03-10 21:14:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:33,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:33,546 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:33,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:33,746 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:33,746 INFO L82 PathProgramCache]: Analyzing trace with hash -913888382, now seen corresponding path program 226 times [2021-03-10 21:14:33,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:33,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791872919] [2021-03-10 21:14:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:33,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791872919] [2021-03-10 21:14:33,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950291165] [2021-03-10 21:14:33,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:33,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:33,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:33,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 21:14:33,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:34,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:14:34,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-03-10 21:14:34,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,199 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-03-10 21:14:34,200 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:14:34,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:14:34,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-03-10 21:14:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:34,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:34,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-03-10 21:14:34,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878909670] [2021-03-10 21:14:34,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:14:34,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:34,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:14:34,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:14:34,210 INFO L87 Difference]: Start difference. First operand 19058 states and 49192 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:38,985 INFO L93 Difference]: Finished difference Result 40642 states and 96916 transitions. [2021-03-10 21:14:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2021-03-10 21:14:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:39,032 INFO L225 Difference]: With dead ends: 40642 [2021-03-10 21:14:39,032 INFO L226 Difference]: Without dead ends: 39470 [2021-03-10 21:14:39,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16412 ImplicationChecksByTransitivity, 3664.8ms TimeCoverageRelationStatistics Valid=3047, Invalid=35959, Unknown=0, NotChecked=0, Total=39006 [2021-03-10 21:14:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39470 states. [2021-03-10 21:14:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39470 to 24061. [2021-03-10 21:14:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24061 states, 24060 states have (on average 2.5862011637572735) internal successors, (62224), 24060 states have internal predecessors, (62224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24061 states to 24061 states and 62224 transitions. [2021-03-10 21:14:39,477 INFO L78 Accepts]: Start accepts. Automaton has 24061 states and 62224 transitions. Word has length 53 [2021-03-10 21:14:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:39,477 INFO L480 AbstractCegarLoop]: Abstraction has 24061 states and 62224 transitions. [2021-03-10 21:14:39,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 24061 states and 62224 transitions. [2021-03-10 21:14:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:39,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:39,487 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:39,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-03-10 21:14:39,687 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:39,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:39,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1151949899, now seen corresponding path program 121 times [2021-03-10 21:14:39,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:39,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962784968] [2021-03-10 21:14:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:39,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962784968] [2021-03-10 21:14:39,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422324505] [2021-03-10 21:14:39,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:39,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:14:39,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:39,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:39,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-03-10 21:14:39,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307444797] [2021-03-10 21:14:39,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:39,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:39,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:39,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:39,909 INFO L87 Difference]: Start difference. First operand 24061 states and 62224 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:40,262 INFO L93 Difference]: Finished difference Result 26620 states and 67456 transitions. [2021-03-10 21:14:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:40,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:40,295 INFO L225 Difference]: With dead ends: 26620 [2021-03-10 21:14:40,295 INFO L226 Difference]: Without dead ends: 26606 [2021-03-10 21:14:40,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26606 states. [2021-03-10 21:14:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26606 to 22975. [2021-03-10 21:14:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22975 states, 22974 states have (on average 2.5736049447201186) internal successors, (59126), 22974 states have internal predecessors, (59126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22975 states to 22975 states and 59126 transitions. [2021-03-10 21:14:40,625 INFO L78 Accepts]: Start accepts. Automaton has 22975 states and 59126 transitions. Word has length 53 [2021-03-10 21:14:40,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:40,625 INFO L480 AbstractCegarLoop]: Abstraction has 22975 states and 59126 transitions. [2021-03-10 21:14:40,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 22975 states and 59126 transitions. [2021-03-10 21:14:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:40,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:40,635 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:40,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable821,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:40,835 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:40,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1773830309, now seen corresponding path program 122 times [2021-03-10 21:14:40,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:40,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493773077] [2021-03-10 21:14:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:40,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493773077] [2021-03-10 21:14:40,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49227132] [2021-03-10 21:14:40,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:40,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:40,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:40,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:40,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:41,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:41,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-03-10 21:14:41,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420224537] [2021-03-10 21:14:41,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:14:41,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:41,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:14:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:41,049 INFO L87 Difference]: Start difference. First operand 22975 states and 59126 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:41,488 INFO L93 Difference]: Finished difference Result 29857 states and 74280 transitions. [2021-03-10 21:14:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:14:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:41,527 INFO L225 Difference]: With dead ends: 29857 [2021-03-10 21:14:41,528 INFO L226 Difference]: Without dead ends: 29857 [2021-03-10 21:14:41,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29857 states. [2021-03-10 21:14:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29857 to 22992. [2021-03-10 21:14:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22992 states, 22991 states have (on average 2.5737897438127963) internal successors, (59174), 22991 states have internal predecessors, (59174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22992 states to 22992 states and 59174 transitions. [2021-03-10 21:14:42,025 INFO L78 Accepts]: Start accepts. Automaton has 22992 states and 59174 transitions. Word has length 53 [2021-03-10 21:14:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:42,025 INFO L480 AbstractCegarLoop]: Abstraction has 22992 states and 59174 transitions. [2021-03-10 21:14:42,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 22992 states and 59174 transitions. [2021-03-10 21:14:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:42,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:42,033 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:42,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:42,234 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash 883564531, now seen corresponding path program 123 times [2021-03-10 21:14:42,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:42,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549268274] [2021-03-10 21:14:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:42,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549268274] [2021-03-10 21:14:42,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016873381] [2021-03-10 21:14:42,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:42,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:14:42,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:42,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:14:42,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 91 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:42,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:42,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-03-10 21:14:42,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777628315] [2021-03-10 21:14:42,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:42,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:42,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:42,492 INFO L87 Difference]: Start difference. First operand 22992 states and 59174 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:43,073 INFO L93 Difference]: Finished difference Result 26754 states and 66944 transitions. [2021-03-10 21:14:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:14:43,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:43,107 INFO L225 Difference]: With dead ends: 26754 [2021-03-10 21:14:43,107 INFO L226 Difference]: Without dead ends: 26754 [2021-03-10 21:14:43,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=324, Invalid=546, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:14:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26754 states. [2021-03-10 21:14:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26754 to 22375. [2021-03-10 21:14:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22375 states, 22374 states have (on average 2.587333512112273) internal successors, (57889), 22374 states have internal predecessors, (57889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22375 states to 22375 states and 57889 transitions. [2021-03-10 21:14:43,428 INFO L78 Accepts]: Start accepts. Automaton has 22375 states and 57889 transitions. Word has length 53 [2021-03-10 21:14:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:43,428 INFO L480 AbstractCegarLoop]: Abstraction has 22375 states and 57889 transitions. [2021-03-10 21:14:43,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 22375 states and 57889 transitions. [2021-03-10 21:14:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-03-10 21:14:43,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:43,438 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:43,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:43,638 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:43,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1321467447, now seen corresponding path program 227 times [2021-03-10 21:14:43,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:43,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644676433] [2021-03-10 21:14:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:43,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644676433] [2021-03-10 21:14:43,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425693963] [2021-03-10 21:14:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:43,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:14:43,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:43,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:43,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:43,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 19 [2021-03-10 21:14:43,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609700304] [2021-03-10 21:14:43,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:14:43,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:43,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:14:43,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:14:43,964 INFO L87 Difference]: Start difference. First operand 22375 states and 57889 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:44,395 INFO L93 Difference]: Finished difference Result 25271 states and 64037 transitions. [2021-03-10 21:14:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:14:44,396 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-03-10 21:14:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:44,425 INFO L225 Difference]: With dead ends: 25271 [2021-03-10 21:14:44,425 INFO L226 Difference]: Without dead ends: 25206 [2021-03-10 21:14:44,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:14:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25206 states. [2021-03-10 21:14:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25206 to 22384. [2021-03-10 21:14:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22384 states, 22383 states have (on average 2.5869186436134566) internal successors, (57903), 22383 states have internal predecessors, (57903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22384 states to 22384 states and 57903 transitions. [2021-03-10 21:14:44,724 INFO L78 Accepts]: Start accepts. Automaton has 22384 states and 57903 transitions. Word has length 53 [2021-03-10 21:14:44,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:44,724 INFO L480 AbstractCegarLoop]: Abstraction has 22384 states and 57903 transitions. [2021-03-10 21:14:44,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 22384 states and 57903 transitions. [2021-03-10 21:14:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 21:14:44,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:44,734 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:44,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:44,934 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:44,935 INFO L82 PathProgramCache]: Analyzing trace with hash 402955128, now seen corresponding path program 228 times [2021-03-10 21:14:44,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:44,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912548465] [2021-03-10 21:14:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:45,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912548465] [2021-03-10 21:14:45,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542873901] [2021-03-10 21:14:45,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:45,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 21:14:45,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:45,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:14:45,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:45,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:45,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 25 [2021-03-10 21:14:45,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103492258] [2021-03-10 21:14:45,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:14:45,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:45,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:14:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:14:45,525 INFO L87 Difference]: Start difference. First operand 22384 states and 57903 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:46,792 INFO L93 Difference]: Finished difference Result 27178 states and 68058 transitions. [2021-03-10 21:14:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:14:46,793 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 21:14:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:46,825 INFO L225 Difference]: With dead ends: 27178 [2021-03-10 21:14:46,825 INFO L226 Difference]: Without dead ends: 27125 [2021-03-10 21:14:46,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 617.7ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:14:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27125 states. [2021-03-10 21:14:47,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27125 to 24344. [2021-03-10 21:14:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24344 states, 24343 states have (on average 2.569527174136302) internal successors, (62550), 24343 states have internal predecessors, (62550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24344 states to 24344 states and 62550 transitions. [2021-03-10 21:14:47,158 INFO L78 Accepts]: Start accepts. Automaton has 24344 states and 62550 transitions. Word has length 56 [2021-03-10 21:14:47,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:47,158 INFO L480 AbstractCegarLoop]: Abstraction has 24344 states and 62550 transitions. [2021-03-10 21:14:47,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 24344 states and 62550 transitions. [2021-03-10 21:14:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 21:14:47,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:47,171 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:47,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable837 [2021-03-10 21:14:47,371 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:47,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1678028872, now seen corresponding path program 229 times [2021-03-10 21:14:47,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:47,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049289461] [2021-03-10 21:14:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:14:47,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049289461] [2021-03-10 21:14:47,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049591847] [2021-03-10 21:14:47,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:47,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:14:47,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:14:47,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:47,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:14:47,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260971360] [2021-03-10 21:14:47,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:47,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:47,577 INFO L87 Difference]: Start difference. First operand 24344 states and 62550 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:48,023 INFO L93 Difference]: Finished difference Result 26354 states and 66735 transitions. [2021-03-10 21:14:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:48,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 21:14:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:48,053 INFO L225 Difference]: With dead ends: 26354 [2021-03-10 21:14:48,053 INFO L226 Difference]: Without dead ends: 26282 [2021-03-10 21:14:48,054 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26282 states. [2021-03-10 21:14:48,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26282 to 24485. [2021-03-10 21:14:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24485 states, 24484 states have (on average 2.566533246201601) internal successors, (62839), 24484 states have internal predecessors, (62839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24485 states to 24485 states and 62839 transitions. [2021-03-10 21:14:48,374 INFO L78 Accepts]: Start accepts. Automaton has 24485 states and 62839 transitions. Word has length 56 [2021-03-10 21:14:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:48,375 INFO L480 AbstractCegarLoop]: Abstraction has 24485 states and 62839 transitions. [2021-03-10 21:14:48,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24485 states and 62839 transitions. [2021-03-10 21:14:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 21:14:48,387 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:48,387 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:48,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-03-10 21:14:48,588 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1737333915, now seen corresponding path program 7 times [2021-03-10 21:14:48,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:48,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268145282] [2021-03-10 21:14:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 29 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:48,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268145282] [2021-03-10 21:14:48,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973211217] [2021-03-10 21:14:48,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:48,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:49,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:49,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 21:14:49,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471816560] [2021-03-10 21:14:49,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:49,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:49,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:49,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:49,141 INFO L87 Difference]: Start difference. First operand 24485 states and 62839 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:50,248 INFO L93 Difference]: Finished difference Result 24589 states and 62987 transitions. [2021-03-10 21:14:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:14:50,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 21:14:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:50,277 INFO L225 Difference]: With dead ends: 24589 [2021-03-10 21:14:50,278 INFO L226 Difference]: Without dead ends: 24423 [2021-03-10 21:14:50,278 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24423 states. [2021-03-10 21:14:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24423 to 24395. [2021-03-10 21:14:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24395 states, 24394 states have (on average 2.567721570878085) internal successors, (62637), 24394 states have internal predecessors, (62637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24395 states to 24395 states and 62637 transitions. [2021-03-10 21:14:50,620 INFO L78 Accepts]: Start accepts. Automaton has 24395 states and 62637 transitions. Word has length 56 [2021-03-10 21:14:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:50,620 INFO L480 AbstractCegarLoop]: Abstraction has 24395 states and 62637 transitions. [2021-03-10 21:14:50,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 24395 states and 62637 transitions. [2021-03-10 21:14:50,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 21:14:50,633 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:50,633 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:50,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-03-10 21:14:50,833 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:50,834 INFO L82 PathProgramCache]: Analyzing trace with hash 173585170, now seen corresponding path program 230 times [2021-03-10 21:14:50,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:50,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067467001] [2021-03-10 21:14:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:14:50,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067467001] [2021-03-10 21:14:50,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727163842] [2021-03-10 21:14:50,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:50,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:50,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:50,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:14:50,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 46 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:51,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:51,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-03-10 21:14:51,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634799688] [2021-03-10 21:14:51,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:51,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:51,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:51,181 INFO L87 Difference]: Start difference. First operand 24395 states and 62637 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:52,407 INFO L93 Difference]: Finished difference Result 32253 states and 79396 transitions. [2021-03-10 21:14:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:14:52,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 21:14:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:52,445 INFO L225 Difference]: With dead ends: 32253 [2021-03-10 21:14:52,446 INFO L226 Difference]: Without dead ends: 32152 [2021-03-10 21:14:52,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:14:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32152 states. [2021-03-10 21:14:52,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32152 to 24633. [2021-03-10 21:14:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24633 states, 24632 states have (on average 2.5644689834361807) internal successors, (63168), 24632 states have internal predecessors, (63168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24633 states to 24633 states and 63168 transitions. [2021-03-10 21:14:52,822 INFO L78 Accepts]: Start accepts. Automaton has 24633 states and 63168 transitions. Word has length 56 [2021-03-10 21:14:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:52,822 INFO L480 AbstractCegarLoop]: Abstraction has 24633 states and 63168 transitions. [2021-03-10 21:14:52,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:52,822 INFO L276 IsEmpty]: Start isEmpty. Operand 24633 states and 63168 transitions. [2021-03-10 21:14:52,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 21:14:52,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:52,835 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:53,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-03-10 21:14:53,035 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:53,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1342527864, now seen corresponding path program 231 times [2021-03-10 21:14:53,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:53,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804507778] [2021-03-10 21:14:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:14:53,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804507778] [2021-03-10 21:14:53,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930001028] [2021-03-10 21:14:53,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:53,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-03-10 21:14:53,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:53,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:14:53,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 36 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:53,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:53,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-03-10 21:14:53,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626213099] [2021-03-10 21:14:53,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:53,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:53,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:53,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:53,384 INFO L87 Difference]: Start difference. First operand 24633 states and 63168 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:54,727 INFO L93 Difference]: Finished difference Result 32833 states and 80582 transitions. [2021-03-10 21:14:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:14:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 21:14:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:54,762 INFO L225 Difference]: With dead ends: 32833 [2021-03-10 21:14:54,762 INFO L226 Difference]: Without dead ends: 32760 [2021-03-10 21:14:54,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:14:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32760 states. [2021-03-10 21:14:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32760 to 24693. [2021-03-10 21:14:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24693 states, 24692 states have (on average 2.562894864733517) internal successors, (63283), 24692 states have internal predecessors, (63283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24693 states to 24693 states and 63283 transitions. [2021-03-10 21:14:55,129 INFO L78 Accepts]: Start accepts. Automaton has 24693 states and 63283 transitions. Word has length 56 [2021-03-10 21:14:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:55,129 INFO L480 AbstractCegarLoop]: Abstraction has 24693 states and 63283 transitions. [2021-03-10 21:14:55,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 24693 states and 63283 transitions. [2021-03-10 21:14:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 21:14:55,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:55,143 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:55,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:55,343 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:55,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1719488850, now seen corresponding path program 232 times [2021-03-10 21:14:55,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:55,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699369306] [2021-03-10 21:14:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:14:55,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699369306] [2021-03-10 21:14:55,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982130353] [2021-03-10 21:14:55,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:55,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:55,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:55,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:14:55,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:14:55,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:55,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:14:55,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663511144] [2021-03-10 21:14:55,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:55,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:55,543 INFO L87 Difference]: Start difference. First operand 24693 states and 63283 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:56,005 INFO L93 Difference]: Finished difference Result 25814 states and 65561 transitions. [2021-03-10 21:14:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:56,006 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 21:14:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:56,036 INFO L225 Difference]: With dead ends: 25814 [2021-03-10 21:14:56,036 INFO L226 Difference]: Without dead ends: 25773 [2021-03-10 21:14:56,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25773 states. [2021-03-10 21:14:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25773 to 24731. [2021-03-10 21:14:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24731 states, 24730 states have (on average 2.5619086130206226) internal successors, (63356), 24730 states have internal predecessors, (63356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24731 states to 24731 states and 63356 transitions. [2021-03-10 21:14:56,367 INFO L78 Accepts]: Start accepts. Automaton has 24731 states and 63356 transitions. Word has length 56 [2021-03-10 21:14:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:56,367 INFO L480 AbstractCegarLoop]: Abstraction has 24731 states and 63356 transitions. [2021-03-10 21:14:56,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 24731 states and 63356 transitions. [2021-03-10 21:14:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 21:14:56,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:56,380 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:56,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-03-10 21:14:56,581 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:56,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1774337938, now seen corresponding path program 233 times [2021-03-10 21:14:56,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:56,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65150080] [2021-03-10 21:14:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:14:56,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65150080] [2021-03-10 21:14:56,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27317748] [2021-03-10 21:14:56,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:56,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-03-10 21:14:56,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:14:56,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:14:56,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:56,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 21:14:56,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577617973] [2021-03-10 21:14:56,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:14:56,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:14:56,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:56,788 INFO L87 Difference]: Start difference. First operand 24731 states and 63356 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:57,265 INFO L93 Difference]: Finished difference Result 26018 states and 65962 transitions. [2021-03-10 21:14:57,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:57,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 21:14:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:57,296 INFO L225 Difference]: With dead ends: 26018 [2021-03-10 21:14:57,296 INFO L226 Difference]: Without dead ends: 25979 [2021-03-10 21:14:57,296 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25979 states. [2021-03-10 21:14:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25979 to 24894. [2021-03-10 21:14:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24894 states, 24893 states have (on average 2.5581890491302777) internal successors, (63681), 24893 states have internal predecessors, (63681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24894 states to 24894 states and 63681 transitions. [2021-03-10 21:14:57,702 INFO L78 Accepts]: Start accepts. Automaton has 24894 states and 63681 transitions. Word has length 56 [2021-03-10 21:14:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:57,702 INFO L480 AbstractCegarLoop]: Abstraction has 24894 states and 63681 transitions. [2021-03-10 21:14:57,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 24894 states and 63681 transitions. [2021-03-10 21:14:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 21:14:57,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:57,715 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:57,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:57,915 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:57,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:57,915 INFO L82 PathProgramCache]: Analyzing trace with hash -776860661, now seen corresponding path program 8 times [2021-03-10 21:14:57,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:57,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888526470] [2021-03-10 21:14:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:58,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888526470] [2021-03-10 21:14:58,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166189410] [2021-03-10 21:14:58,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:58,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:58,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:58,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:14:58,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:58,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:58,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 21:14:58,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551197321] [2021-03-10 21:14:58,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:14:58,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:58,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:14:58,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:14:58,411 INFO L87 Difference]: Start difference. First operand 24894 states and 63681 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:59,403 INFO L93 Difference]: Finished difference Result 25034 states and 63907 transitions. [2021-03-10 21:14:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:14:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 21:14:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:59,433 INFO L225 Difference]: With dead ends: 25034 [2021-03-10 21:14:59,434 INFO L226 Difference]: Without dead ends: 24892 [2021-03-10 21:14:59,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:14:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24892 states. [2021-03-10 21:14:59,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24892 to 24864. [2021-03-10 21:14:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24864 states, 24863 states have (on average 2.5579777178940595) internal successors, (63599), 24863 states have internal predecessors, (63599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24864 states to 24864 states and 63599 transitions. [2021-03-10 21:14:59,744 INFO L78 Accepts]: Start accepts. Automaton has 24864 states and 63599 transitions. Word has length 56 [2021-03-10 21:14:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:59,745 INFO L480 AbstractCegarLoop]: Abstraction has 24864 states and 63599 transitions. [2021-03-10 21:14:59,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 24864 states and 63599 transitions. [2021-03-10 21:14:59,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 21:14:59,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:59,758 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:59,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:59,958 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:59,958 INFO L82 PathProgramCache]: Analyzing trace with hash -929908061, now seen corresponding path program 9 times [2021-03-10 21:14:59,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:59,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103583912] [2021-03-10 21:14:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:00,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103583912] [2021-03-10 21:15:00,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66744410] [2021-03-10 21:15:00,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:00,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:15:00,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:15:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:00,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:00,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-03-10 21:15:00,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089012655] [2021-03-10 21:15:00,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:15:00,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:00,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:15:00,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:15:00,491 INFO L87 Difference]: Start difference. First operand 24864 states and 63599 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:01,647 INFO L93 Difference]: Finished difference Result 25092 states and 63979 transitions. [2021-03-10 21:15:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:15:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-03-10 21:15:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:01,678 INFO L225 Difference]: With dead ends: 25092 [2021-03-10 21:15:01,678 INFO L226 Difference]: Without dead ends: 24915 [2021-03-10 21:15:01,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 488.5ms TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:15:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24915 states. [2021-03-10 21:15:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24915 to 24796. [2021-03-10 21:15:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24796 states, 24795 states have (on average 2.5587820125025207) internal successors, (63445), 24795 states have internal predecessors, (63445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24796 states to 24796 states and 63445 transitions. [2021-03-10 21:15:02,134 INFO L78 Accepts]: Start accepts. Automaton has 24796 states and 63445 transitions. Word has length 56 [2021-03-10 21:15:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:02,134 INFO L480 AbstractCegarLoop]: Abstraction has 24796 states and 63445 transitions. [2021-03-10 21:15:02,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24796 states and 63445 transitions. [2021-03-10 21:15:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:02,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:02,149 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:02,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-03-10 21:15:02,350 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:02,351 INFO L82 PathProgramCache]: Analyzing trace with hash -848422539, now seen corresponding path program 124 times [2021-03-10 21:15:02,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:02,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465002108] [2021-03-10 21:15:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:02,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465002108] [2021-03-10 21:15:02,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53046985] [2021-03-10 21:15:02,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:02,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:02,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:02,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:02,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:02,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:02,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:15:02,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366579443] [2021-03-10 21:15:02,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:02,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:02,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:02,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:02,728 INFO L87 Difference]: Start difference. First operand 24796 states and 63445 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:04,161 INFO L93 Difference]: Finished difference Result 31414 states and 78165 transitions. [2021-03-10 21:15:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:15:04,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:04,200 INFO L225 Difference]: With dead ends: 31414 [2021-03-10 21:15:04,200 INFO L226 Difference]: Without dead ends: 31125 [2021-03-10 21:15:04,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 641.7ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:15:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31125 states. [2021-03-10 21:15:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31125 to 23378. [2021-03-10 21:15:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23378 states, 23377 states have (on average 2.5538349659922144) internal successors, (59701), 23377 states have internal predecessors, (59701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23378 states to 23378 states and 59701 transitions. [2021-03-10 21:15:04,540 INFO L78 Accepts]: Start accepts. Automaton has 23378 states and 59701 transitions. Word has length 59 [2021-03-10 21:15:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:04,540 INFO L480 AbstractCegarLoop]: Abstraction has 23378 states and 59701 transitions. [2021-03-10 21:15:04,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 23378 states and 59701 transitions. [2021-03-10 21:15:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:04,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:04,555 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:04,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:04,755 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:04,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:04,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1136637532, now seen corresponding path program 234 times [2021-03-10 21:15:04,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:04,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088573878] [2021-03-10 21:15:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:04,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088573878] [2021-03-10 21:15:04,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473262420] [2021-03-10 21:15:04,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:04,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:15:04,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:04,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:04,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:05,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:05,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:15:05,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833968409] [2021-03-10 21:15:05,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:05,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:05,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:05,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:05,028 INFO L87 Difference]: Start difference. First operand 23378 states and 59701 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:05,581 INFO L93 Difference]: Finished difference Result 25495 states and 64090 transitions. [2021-03-10 21:15:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:05,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:05,612 INFO L225 Difference]: With dead ends: 25495 [2021-03-10 21:15:05,613 INFO L226 Difference]: Without dead ends: 25447 [2021-03-10 21:15:05,613 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:05,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25447 states. [2021-03-10 21:15:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25447 to 23528. [2021-03-10 21:15:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23528 states, 23527 states have (on average 2.556934585795044) internal successors, (60157), 23527 states have internal predecessors, (60157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23528 states to 23528 states and 60157 transitions. [2021-03-10 21:15:05,934 INFO L78 Accepts]: Start accepts. Automaton has 23528 states and 60157 transitions. Word has length 59 [2021-03-10 21:15:05,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:05,934 INFO L480 AbstractCegarLoop]: Abstraction has 23528 states and 60157 transitions. [2021-03-10 21:15:05,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 23528 states and 60157 transitions. [2021-03-10 21:15:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:05,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:05,949 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:06,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:06,150 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:06,150 INFO L82 PathProgramCache]: Analyzing trace with hash -832619211, now seen corresponding path program 235 times [2021-03-10 21:15:06,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:06,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232924138] [2021-03-10 21:15:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 159 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:06,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232924138] [2021-03-10 21:15:06,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485346109] [2021-03-10 21:15:06,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:06,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:06,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:06,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:06,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-03-10 21:15:06,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977998972] [2021-03-10 21:15:06,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:15:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:06,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:15:06,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:06,870 INFO L87 Difference]: Start difference. First operand 23528 states and 60157 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:08,768 INFO L93 Difference]: Finished difference Result 24119 states and 61217 transitions. [2021-03-10 21:15:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:15:08,769 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:08,796 INFO L225 Difference]: With dead ends: 24119 [2021-03-10 21:15:08,796 INFO L226 Difference]: Without dead ends: 23811 [2021-03-10 21:15:08,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 472.8ms TimeCoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23811 states. [2021-03-10 21:15:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23811 to 23436. [2021-03-10 21:15:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23436 states, 23435 states have (on average 2.5522509067633883) internal successors, (59812), 23435 states have internal predecessors, (59812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23436 states to 23436 states and 59812 transitions. [2021-03-10 21:15:09,080 INFO L78 Accepts]: Start accepts. Automaton has 23436 states and 59812 transitions. Word has length 59 [2021-03-10 21:15:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:09,080 INFO L480 AbstractCegarLoop]: Abstraction has 23436 states and 59812 transitions. [2021-03-10 21:15:09,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 23436 states and 59812 transitions. [2021-03-10 21:15:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:09,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:09,094 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:09,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-03-10 21:15:09,294 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:09,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1852033535, now seen corresponding path program 236 times [2021-03-10 21:15:09,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:09,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574850649] [2021-03-10 21:15:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:09,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574850649] [2021-03-10 21:15:09,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581837719] [2021-03-10 21:15:09,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:09,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:09,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:09,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:09,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:09,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:09,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:15:09,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070509677] [2021-03-10 21:15:09,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:09,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:09,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:09,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:09,605 INFO L87 Difference]: Start difference. First operand 23436 states and 59812 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:10,241 INFO L93 Difference]: Finished difference Result 24213 states and 61314 transitions. [2021-03-10 21:15:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:10,270 INFO L225 Difference]: With dead ends: 24213 [2021-03-10 21:15:10,270 INFO L226 Difference]: Without dead ends: 24159 [2021-03-10 21:15:10,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:10,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24159 states. [2021-03-10 21:15:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24159 to 23420. [2021-03-10 21:15:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23420 states, 23419 states have (on average 2.5535676160382597) internal successors, (59802), 23419 states have internal predecessors, (59802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23420 states to 23420 states and 59802 transitions. [2021-03-10 21:15:10,575 INFO L78 Accepts]: Start accepts. Automaton has 23420 states and 59802 transitions. Word has length 59 [2021-03-10 21:15:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:10,575 INFO L480 AbstractCegarLoop]: Abstraction has 23420 states and 59802 transitions. [2021-03-10 21:15:10,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 23420 states and 59802 transitions. [2021-03-10 21:15:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:10,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:10,589 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:10,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable852 [2021-03-10 21:15:10,790 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -267823288, now seen corresponding path program 125 times [2021-03-10 21:15:10,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:10,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561939220] [2021-03-10 21:15:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 102 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:10,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561939220] [2021-03-10 21:15:10,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818304282] [2021-03-10 21:15:10,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:10,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:15:10,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:10,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:10,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:11,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:11,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-03-10 21:15:11,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977940684] [2021-03-10 21:15:11,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:15:11,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:11,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:15:11,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:11,070 INFO L87 Difference]: Start difference. First operand 23420 states and 59802 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:11,572 INFO L93 Difference]: Finished difference Result 32163 states and 79228 transitions. [2021-03-10 21:15:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:11,574 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:11,620 INFO L225 Difference]: With dead ends: 32163 [2021-03-10 21:15:11,620 INFO L226 Difference]: Without dead ends: 32163 [2021-03-10 21:15:11,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:15:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32163 states. [2021-03-10 21:15:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32163 to 25200. [2021-03-10 21:15:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25200 states, 25199 states have (on average 2.578713441009564) internal successors, (64981), 25199 states have internal predecessors, (64981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25200 states to 25200 states and 64981 transitions. [2021-03-10 21:15:12,134 INFO L78 Accepts]: Start accepts. Automaton has 25200 states and 64981 transitions. Word has length 59 [2021-03-10 21:15:12,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:12,135 INFO L480 AbstractCegarLoop]: Abstraction has 25200 states and 64981 transitions. [2021-03-10 21:15:12,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,135 INFO L276 IsEmpty]: Start isEmpty. Operand 25200 states and 64981 transitions. [2021-03-10 21:15:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:12,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:12,150 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:12,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-03-10 21:15:12,366 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:12,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:12,366 INFO L82 PathProgramCache]: Analyzing trace with hash -801688664, now seen corresponding path program 237 times [2021-03-10 21:15:12,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:12,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124310313] [2021-03-10 21:15:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:12,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124310313] [2021-03-10 21:15:12,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338862919] [2021-03-10 21:15:12,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:12,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:15:12,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:12,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:12,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:12,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:15:12,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52397734] [2021-03-10 21:15:12,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:12,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:12,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:12,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:12,647 INFO L87 Difference]: Start difference. First operand 25200 states and 64981 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:12,927 INFO L93 Difference]: Finished difference Result 26418 states and 67563 transitions. [2021-03-10 21:15:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:12,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:12,965 INFO L225 Difference]: With dead ends: 26418 [2021-03-10 21:15:12,965 INFO L226 Difference]: Without dead ends: 26415 [2021-03-10 21:15:12,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:12,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26415 states. [2021-03-10 21:15:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26415 to 25200. [2021-03-10 21:15:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25200 states, 25199 states have (on average 2.578634072780666) internal successors, (64979), 25199 states have internal predecessors, (64979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25200 states to 25200 states and 64979 transitions. [2021-03-10 21:15:13,345 INFO L78 Accepts]: Start accepts. Automaton has 25200 states and 64979 transitions. Word has length 59 [2021-03-10 21:15:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:13,345 INFO L480 AbstractCegarLoop]: Abstraction has 25200 states and 64979 transitions. [2021-03-10 21:15:13,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 25200 states and 64979 transitions. [2021-03-10 21:15:13,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:13,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:13,360 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:13,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable854,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:13,575 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:13,575 INFO L82 PathProgramCache]: Analyzing trace with hash 925621557, now seen corresponding path program 126 times [2021-03-10 21:15:13,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:13,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030520576] [2021-03-10 21:15:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:13,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030520576] [2021-03-10 21:15:13,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114567639] [2021-03-10 21:15:13,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:13,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 21:15:13,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:13,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:13,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:13,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:15:13,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103856558] [2021-03-10 21:15:13,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:13,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:13,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:13,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:13,857 INFO L87 Difference]: Start difference. First operand 25200 states and 64979 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:14,563 INFO L93 Difference]: Finished difference Result 27878 states and 70606 transitions. [2021-03-10 21:15:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:14,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:14,600 INFO L225 Difference]: With dead ends: 27878 [2021-03-10 21:15:14,600 INFO L226 Difference]: Without dead ends: 27819 [2021-03-10 21:15:14,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27819 states. [2021-03-10 21:15:14,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27819 to 25729. [2021-03-10 21:15:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25729 states, 25728 states have (on average 2.575870646766169) internal successors, (66272), 25728 states have internal predecessors, (66272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25729 states to 25729 states and 66272 transitions. [2021-03-10 21:15:14,969 INFO L78 Accepts]: Start accepts. Automaton has 25729 states and 66272 transitions. Word has length 59 [2021-03-10 21:15:14,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:14,969 INFO L480 AbstractCegarLoop]: Abstraction has 25729 states and 66272 transitions. [2021-03-10 21:15:14,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 25729 states and 66272 transitions. [2021-03-10 21:15:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:14,984 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:14,984 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:15,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable857 [2021-03-10 21:15:15,190 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:15,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:15,190 INFO L82 PathProgramCache]: Analyzing trace with hash -628075300, now seen corresponding path program 238 times [2021-03-10 21:15:15,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:15,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345586408] [2021-03-10 21:15:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345586408] [2021-03-10 21:15:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25547263] [2021-03-10 21:15:15,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:15,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:15,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:15,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:15,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:15,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:15,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:15:15,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96499436] [2021-03-10 21:15:15,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:15:15,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:15,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:15:15,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:15,445 INFO L87 Difference]: Start difference. First operand 25729 states and 66272 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:15,796 INFO L93 Difference]: Finished difference Result 27827 states and 70472 transitions. [2021-03-10 21:15:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:15,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:15,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:15,826 INFO L225 Difference]: With dead ends: 27827 [2021-03-10 21:15:15,826 INFO L226 Difference]: Without dead ends: 27824 [2021-03-10 21:15:15,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:15,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27824 states. [2021-03-10 21:15:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27824 to 25697. [2021-03-10 21:15:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25697 states, 25696 states have (on average 2.5746030510585305) internal successors, (66157), 25696 states have internal predecessors, (66157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25697 states to 25697 states and 66157 transitions. [2021-03-10 21:15:16,177 INFO L78 Accepts]: Start accepts. Automaton has 25697 states and 66157 transitions. Word has length 59 [2021-03-10 21:15:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:16,177 INFO L480 AbstractCegarLoop]: Abstraction has 25697 states and 66157 transitions. [2021-03-10 21:15:16,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 25697 states and 66157 transitions. [2021-03-10 21:15:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:16,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:16,194 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:16,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable858,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:16,394 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:16,395 INFO L82 PathProgramCache]: Analyzing trace with hash -421012734, now seen corresponding path program 239 times [2021-03-10 21:15:16,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:16,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797794347] [2021-03-10 21:15:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 79 proven. 95 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:16,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797794347] [2021-03-10 21:15:16,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430408837] [2021-03-10 21:15:16,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:16,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:15:16,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:16,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:16,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 83 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:16,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:16,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2021-03-10 21:15:16,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173670110] [2021-03-10 21:15:16,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:16,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:16,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:16,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:16,685 INFO L87 Difference]: Start difference. First operand 25697 states and 66157 transitions. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:17,128 INFO L93 Difference]: Finished difference Result 28184 states and 71177 transitions. [2021-03-10 21:15:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:15:17,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:17,162 INFO L225 Difference]: With dead ends: 28184 [2021-03-10 21:15:17,162 INFO L226 Difference]: Without dead ends: 28166 [2021-03-10 21:15:17,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:17,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28166 states. [2021-03-10 21:15:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28166 to 25649. [2021-03-10 21:15:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25649 states, 25648 states have (on average 2.5672956955708046) internal successors, (65846), 25648 states have internal predecessors, (65846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25649 states to 25649 states and 65846 transitions. [2021-03-10 21:15:17,519 INFO L78 Accepts]: Start accepts. Automaton has 25649 states and 65846 transitions. Word has length 59 [2021-03-10 21:15:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:17,519 INFO L480 AbstractCegarLoop]: Abstraction has 25649 states and 65846 transitions. [2021-03-10 21:15:17,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 25649 states and 65846 transitions. [2021-03-10 21:15:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:17,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:17,535 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:17,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-03-10 21:15:17,735 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1869012747, now seen corresponding path program 240 times [2021-03-10 21:15:17,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:17,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005875620] [2021-03-10 21:15:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:17,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005875620] [2021-03-10 21:15:17,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166820352] [2021-03-10 21:15:17,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:17,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 21:15:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:17,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:17,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:18,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:18,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:15:18,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157766858] [2021-03-10 21:15:18,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:18,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:18,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:18,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:18,030 INFO L87 Difference]: Start difference. First operand 25649 states and 65846 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:18,983 INFO L93 Difference]: Finished difference Result 26741 states and 67887 transitions. [2021-03-10 21:15:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:19,016 INFO L225 Difference]: With dead ends: 26741 [2021-03-10 21:15:19,016 INFO L226 Difference]: Without dead ends: 26685 [2021-03-10 21:15:19,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26685 states. [2021-03-10 21:15:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26685 to 25676. [2021-03-10 21:15:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25676 states, 25675 states have (on average 2.5661148977604675) internal successors, (65885), 25675 states have internal predecessors, (65885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:19,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25676 states to 25676 states and 65885 transitions. [2021-03-10 21:15:19,377 INFO L78 Accepts]: Start accepts. Automaton has 25676 states and 65885 transitions. Word has length 59 [2021-03-10 21:15:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:19,378 INFO L480 AbstractCegarLoop]: Abstraction has 25676 states and 65885 transitions. [2021-03-10 21:15:19,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 25676 states and 65885 transitions. [2021-03-10 21:15:19,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:19,393 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:19,393 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:19,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable863 [2021-03-10 21:15:19,594 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:19,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1812418369, now seen corresponding path program 241 times [2021-03-10 21:15:19,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:19,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580240587] [2021-03-10 21:15:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:19,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580240587] [2021-03-10 21:15:19,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065120999] [2021-03-10 21:15:19,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:19,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:19,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:19,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:19,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:15:19,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378835992] [2021-03-10 21:15:19,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:19,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:19,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:19,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:19,861 INFO L87 Difference]: Start difference. First operand 25676 states and 65885 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:20,745 INFO L93 Difference]: Finished difference Result 27106 states and 68721 transitions. [2021-03-10 21:15:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:20,746 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:20,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:20,780 INFO L225 Difference]: With dead ends: 27106 [2021-03-10 21:15:20,780 INFO L226 Difference]: Without dead ends: 27065 [2021-03-10 21:15:20,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27065 states. [2021-03-10 21:15:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27065 to 25371. [2021-03-10 21:15:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25371 states, 25370 states have (on average 2.567441860465116) internal successors, (65136), 25370 states have internal predecessors, (65136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25371 states to 25371 states and 65136 transitions. [2021-03-10 21:15:21,130 INFO L78 Accepts]: Start accepts. Automaton has 25371 states and 65136 transitions. Word has length 59 [2021-03-10 21:15:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:21,130 INFO L480 AbstractCegarLoop]: Abstraction has 25371 states and 65136 transitions. [2021-03-10 21:15:21,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 25371 states and 65136 transitions. [2021-03-10 21:15:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:21,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:21,144 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:21,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable864,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:21,345 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:21,345 INFO L82 PathProgramCache]: Analyzing trace with hash -340631593, now seen corresponding path program 242 times [2021-03-10 21:15:21,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:21,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748349709] [2021-03-10 21:15:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:21,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748349709] [2021-03-10 21:15:21,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445916312] [2021-03-10 21:15:21,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:21,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:21,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:21,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:21,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:21,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:21,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:15:21,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830036065] [2021-03-10 21:15:21,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:21,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:21,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:21,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:21,623 INFO L87 Difference]: Start difference. First operand 25371 states and 65136 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:22,474 INFO L93 Difference]: Finished difference Result 27600 states and 69679 transitions. [2021-03-10 21:15:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:15:22,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:22,507 INFO L225 Difference]: With dead ends: 27600 [2021-03-10 21:15:22,507 INFO L226 Difference]: Without dead ends: 27588 [2021-03-10 21:15:22,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27588 states. [2021-03-10 21:15:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27588 to 25418. [2021-03-10 21:15:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25418 states, 25417 states have (on average 2.5673761655584846) internal successors, (65255), 25417 states have internal predecessors, (65255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25418 states to 25418 states and 65255 transitions. [2021-03-10 21:15:22,864 INFO L78 Accepts]: Start accepts. Automaton has 25418 states and 65255 transitions. Word has length 59 [2021-03-10 21:15:22,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:22,865 INFO L480 AbstractCegarLoop]: Abstraction has 25418 states and 65255 transitions. [2021-03-10 21:15:22,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25418 states and 65255 transitions. [2021-03-10 21:15:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:22,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:22,880 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:23,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-03-10 21:15:23,080 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash -578693110, now seen corresponding path program 127 times [2021-03-10 21:15:23,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:23,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690216609] [2021-03-10 21:15:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:23,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690216609] [2021-03-10 21:15:23,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510745582] [2021-03-10 21:15:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:23,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:23,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:23,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:15:23,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112532098] [2021-03-10 21:15:23,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:23,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:23,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:23,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:23,317 INFO L87 Difference]: Start difference. First operand 25418 states and 65255 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:23,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:23,619 INFO L93 Difference]: Finished difference Result 30955 states and 76257 transitions. [2021-03-10 21:15:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:23,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:23,656 INFO L225 Difference]: With dead ends: 30955 [2021-03-10 21:15:23,656 INFO L226 Difference]: Without dead ends: 30947 [2021-03-10 21:15:23,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30947 states. [2021-03-10 21:15:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30947 to 25630. [2021-03-10 21:15:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25630 states, 25629 states have (on average 2.5715790705841037) internal successors, (65907), 25629 states have internal predecessors, (65907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25630 states to 25630 states and 65907 transitions. [2021-03-10 21:15:24,020 INFO L78 Accepts]: Start accepts. Automaton has 25630 states and 65907 transitions. Word has length 59 [2021-03-10 21:15:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:24,020 INFO L480 AbstractCegarLoop]: Abstraction has 25630 states and 65907 transitions. [2021-03-10 21:15:24,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:24,021 INFO L276 IsEmpty]: Start isEmpty. Operand 25630 states and 65907 transitions. [2021-03-10 21:15:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:24,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:24,139 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:24,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable866,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:24,339 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:24,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:24,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1200573520, now seen corresponding path program 128 times [2021-03-10 21:15:24,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:24,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960921570] [2021-03-10 21:15:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:24,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960921570] [2021-03-10 21:15:24,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215572129] [2021-03-10 21:15:24,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:24,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:24,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:24,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:24,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:24,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:24,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:15:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547722793] [2021-03-10 21:15:24,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:24,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:24,601 INFO L87 Difference]: Start difference. First operand 25630 states and 65907 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:24,906 INFO L93 Difference]: Finished difference Result 34289 states and 84113 transitions. [2021-03-10 21:15:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:24,949 INFO L225 Difference]: With dead ends: 34289 [2021-03-10 21:15:24,949 INFO L226 Difference]: Without dead ends: 34289 [2021-03-10 21:15:24,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:24,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34289 states. [2021-03-10 21:15:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34289 to 25636. [2021-03-10 21:15:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25636 states, 25635 states have (on average 2.5714842988102204) internal successors, (65920), 25635 states have internal predecessors, (65920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25636 states to 25636 states and 65920 transitions. [2021-03-10 21:15:25,337 INFO L78 Accepts]: Start accepts. Automaton has 25636 states and 65920 transitions. Word has length 59 [2021-03-10 21:15:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:25,337 INFO L480 AbstractCegarLoop]: Abstraction has 25636 states and 65920 transitions. [2021-03-10 21:15:25,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 25636 states and 65920 transitions. [2021-03-10 21:15:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:25,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:25,352 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:25,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable868 [2021-03-10 21:15:25,555 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:25,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:25,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1456821320, now seen corresponding path program 129 times [2021-03-10 21:15:25,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:25,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702723437] [2021-03-10 21:15:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:25,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702723437] [2021-03-10 21:15:25,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401428206] [2021-03-10 21:15:25,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:25,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:15:25,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:25,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:25,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:25,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:25,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:15:25,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739008728] [2021-03-10 21:15:25,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:15:25,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:15:25,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:15:25,819 INFO L87 Difference]: Start difference. First operand 25636 states and 65920 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:26,129 INFO L93 Difference]: Finished difference Result 31966 states and 78726 transitions. [2021-03-10 21:15:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:26,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:26,166 INFO L225 Difference]: With dead ends: 31966 [2021-03-10 21:15:26,166 INFO L226 Difference]: Without dead ends: 31966 [2021-03-10 21:15:26,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31966 states. [2021-03-10 21:15:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31966 to 25301. [2021-03-10 21:15:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25301 states, 25300 states have (on average 2.5650592885375496) internal successors, (64896), 25300 states have internal predecessors, (64896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25301 states to 25301 states and 64896 transitions. [2021-03-10 21:15:26,534 INFO L78 Accepts]: Start accepts. Automaton has 25301 states and 64896 transitions. Word has length 59 [2021-03-10 21:15:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:26,534 INFO L480 AbstractCegarLoop]: Abstraction has 25301 states and 64896 transitions. [2021-03-10 21:15:26,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 25301 states and 64896 transitions. [2021-03-10 21:15:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:26,548 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:26,548 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:26,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable869,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:26,748 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:26,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1191927516, now seen corresponding path program 243 times [2021-03-10 21:15:26,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:26,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692875901] [2021-03-10 21:15:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:26,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692875901] [2021-03-10 21:15:26,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141601734] [2021-03-10 21:15:26,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:26,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:15:26,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:26,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:26,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:26,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:26,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:15:26,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040314321] [2021-03-10 21:15:26,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:26,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:26,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:26,998 INFO L87 Difference]: Start difference. First operand 25301 states and 64896 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:27,374 INFO L93 Difference]: Finished difference Result 26818 states and 67820 transitions. [2021-03-10 21:15:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:27,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:27,407 INFO L225 Difference]: With dead ends: 26818 [2021-03-10 21:15:27,407 INFO L226 Difference]: Without dead ends: 26800 [2021-03-10 21:15:27,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:15:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26800 states. [2021-03-10 21:15:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26800 to 25301. [2021-03-10 21:15:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25301 states, 25300 states have (on average 2.564584980237154) internal successors, (64884), 25300 states have internal predecessors, (64884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:27,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25301 states to 25301 states and 64884 transitions. [2021-03-10 21:15:27,872 INFO L78 Accepts]: Start accepts. Automaton has 25301 states and 64884 transitions. Word has length 59 [2021-03-10 21:15:27,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:27,872 INFO L480 AbstractCegarLoop]: Abstraction has 25301 states and 64884 transitions. [2021-03-10 21:15:27,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 25301 states and 64884 transitions. [2021-03-10 21:15:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:27,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:27,886 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:28,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-03-10 21:15:28,086 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:28,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:28,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2094564251, now seen corresponding path program 130 times [2021-03-10 21:15:28,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:28,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181421076] [2021-03-10 21:15:28,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:28,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181421076] [2021-03-10 21:15:28,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113512627] [2021-03-10 21:15:28,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:28,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:28,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:28,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:28,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:28,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:15:28,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004511389] [2021-03-10 21:15:28,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:28,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:28,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:28,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:28,379 INFO L87 Difference]: Start difference. First operand 25301 states and 64884 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:29,165 INFO L93 Difference]: Finished difference Result 27885 states and 70202 transitions. [2021-03-10 21:15:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:29,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:29,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:29,202 INFO L225 Difference]: With dead ends: 27885 [2021-03-10 21:15:29,202 INFO L226 Difference]: Without dead ends: 27836 [2021-03-10 21:15:29,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:29,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27836 states. [2021-03-10 21:15:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27836 to 25566. [2021-03-10 21:15:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25566 states, 25565 states have (on average 2.5637394875806767) internal successors, (65542), 25565 states have internal predecessors, (65542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25566 states to 25566 states and 65542 transitions. [2021-03-10 21:15:29,565 INFO L78 Accepts]: Start accepts. Automaton has 25566 states and 65542 transitions. Word has length 59 [2021-03-10 21:15:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:29,565 INFO L480 AbstractCegarLoop]: Abstraction has 25566 states and 65542 transitions. [2021-03-10 21:15:29,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 25566 states and 65542 transitions. [2021-03-10 21:15:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:29,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:29,580 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:29,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:29,781 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:29,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:29,781 INFO L82 PathProgramCache]: Analyzing trace with hash -700070053, now seen corresponding path program 244 times [2021-03-10 21:15:29,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:29,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857440017] [2021-03-10 21:15:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:29,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857440017] [2021-03-10 21:15:29,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474829696] [2021-03-10 21:15:29,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:29,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:29,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:29,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:29,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:30,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:30,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:15:30,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010430433] [2021-03-10 21:15:30,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:30,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:30,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:30,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:30,062 INFO L87 Difference]: Start difference. First operand 25566 states and 65542 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:31,024 INFO L93 Difference]: Finished difference Result 26742 states and 67731 transitions. [2021-03-10 21:15:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:31,061 INFO L225 Difference]: With dead ends: 26742 [2021-03-10 21:15:31,061 INFO L226 Difference]: Without dead ends: 26674 [2021-03-10 21:15:31,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26674 states. [2021-03-10 21:15:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26674 to 25620. [2021-03-10 21:15:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25620 states, 25619 states have (on average 2.5615363597330107) internal successors, (65624), 25619 states have internal predecessors, (65624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25620 states to 25620 states and 65624 transitions. [2021-03-10 21:15:31,442 INFO L78 Accepts]: Start accepts. Automaton has 25620 states and 65624 transitions. Word has length 59 [2021-03-10 21:15:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:31,442 INFO L480 AbstractCegarLoop]: Abstraction has 25620 states and 65624 transitions. [2021-03-10 21:15:31,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 25620 states and 65624 transitions. [2021-03-10 21:15:31,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:31,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:31,458 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:31,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-03-10 21:15:31,671 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:31,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1313606233, now seen corresponding path program 245 times [2021-03-10 21:15:31,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:31,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489373709] [2021-03-10 21:15:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:31,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489373709] [2021-03-10 21:15:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727784095] [2021-03-10 21:15:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:31,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-03-10 21:15:31,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:31,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:31,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:31,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:31,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:15:31,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71072894] [2021-03-10 21:15:31,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:31,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:31,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:31,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:31,970 INFO L87 Difference]: Start difference. First operand 25620 states and 65624 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:32,760 INFO L93 Difference]: Finished difference Result 27296 states and 68946 transitions. [2021-03-10 21:15:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:32,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:32,794 INFO L225 Difference]: With dead ends: 27296 [2021-03-10 21:15:32,794 INFO L226 Difference]: Without dead ends: 27248 [2021-03-10 21:15:32,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27248 states. [2021-03-10 21:15:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27248 to 25311. [2021-03-10 21:15:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25311 states, 25310 states have (on average 2.563097589885421) internal successors, (64872), 25310 states have internal predecessors, (64872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25311 states to 25311 states and 64872 transitions. [2021-03-10 21:15:33,190 INFO L78 Accepts]: Start accepts. Automaton has 25311 states and 64872 transitions. Word has length 59 [2021-03-10 21:15:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:33,190 INFO L480 AbstractCegarLoop]: Abstraction has 25311 states and 64872 transitions. [2021-03-10 21:15:33,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 25311 states and 64872 transitions. [2021-03-10 21:15:33,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:33,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:33,204 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:33,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable876,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:33,405 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1470905720, now seen corresponding path program 131 times [2021-03-10 21:15:33,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:33,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280006573] [2021-03-10 21:15:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:33,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280006573] [2021-03-10 21:15:33,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080067694] [2021-03-10 21:15:33,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:33,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:15:33,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:33,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:33,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:33,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:33,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-03-10 21:15:33,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078864593] [2021-03-10 21:15:33,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:15:33,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:15:33,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:33,677 INFO L87 Difference]: Start difference. First operand 25311 states and 64872 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:34,004 INFO L93 Difference]: Finished difference Result 30589 states and 75406 transitions. [2021-03-10 21:15:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:15:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:34,045 INFO L225 Difference]: With dead ends: 30589 [2021-03-10 21:15:34,045 INFO L226 Difference]: Without dead ends: 30569 [2021-03-10 21:15:34,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:15:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30569 states. [2021-03-10 21:15:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30569 to 25626. [2021-03-10 21:15:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25626 states, 25625 states have (on average 2.5681951219512196) internal successors, (65810), 25625 states have internal predecessors, (65810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25626 states to 25626 states and 65810 transitions. [2021-03-10 21:15:34,404 INFO L78 Accepts]: Start accepts. Automaton has 25626 states and 65810 transitions. Word has length 59 [2021-03-10 21:15:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:34,404 INFO L480 AbstractCegarLoop]: Abstraction has 25626 states and 65810 transitions. [2021-03-10 21:15:34,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 25626 states and 65810 transitions. [2021-03-10 21:15:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:34,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:34,418 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:34,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-03-10 21:15:34,619 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:34,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1333003560, now seen corresponding path program 246 times [2021-03-10 21:15:34,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:34,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229055354] [2021-03-10 21:15:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:34,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229055354] [2021-03-10 21:15:34,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128040287] [2021-03-10 21:15:34,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:34,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 21:15:34,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:34,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:34,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:34,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:34,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:15:34,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094245420] [2021-03-10 21:15:34,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:34,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:34,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:34,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:34,851 INFO L87 Difference]: Start difference. First operand 25626 states and 65810 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:35,187 INFO L93 Difference]: Finished difference Result 28172 states and 70782 transitions. [2021-03-10 21:15:35,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:35,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:35,220 INFO L225 Difference]: With dead ends: 28172 [2021-03-10 21:15:35,220 INFO L226 Difference]: Without dead ends: 28154 [2021-03-10 21:15:35,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:35,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28154 states. [2021-03-10 21:15:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28154 to 25706. [2021-03-10 21:15:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25706 states, 25705 states have (on average 2.565998832911885) internal successors, (65959), 25705 states have internal predecessors, (65959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25706 states to 25706 states and 65959 transitions. [2021-03-10 21:15:35,570 INFO L78 Accepts]: Start accepts. Automaton has 25706 states and 65959 transitions. Word has length 59 [2021-03-10 21:15:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:35,570 INFO L480 AbstractCegarLoop]: Abstraction has 25706 states and 65959 transitions. [2021-03-10 21:15:35,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 25706 states and 65959 transitions. [2021-03-10 21:15:35,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:35,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:35,585 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:35,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:35,785 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash 828311101, now seen corresponding path program 247 times [2021-03-10 21:15:35,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:35,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435841866] [2021-03-10 21:15:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:35,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435841866] [2021-03-10 21:15:35,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198685623] [2021-03-10 21:15:35,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:35,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:35,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:36,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:36,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:15:36,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117464665] [2021-03-10 21:15:36,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:36,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:36,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:36,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:36,055 INFO L87 Difference]: Start difference. First operand 25706 states and 65959 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:36,957 INFO L93 Difference]: Finished difference Result 29139 states and 73215 transitions. [2021-03-10 21:15:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:15:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:36,991 INFO L225 Difference]: With dead ends: 29139 [2021-03-10 21:15:36,992 INFO L226 Difference]: Without dead ends: 29097 [2021-03-10 21:15:36,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:15:37,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29097 states. [2021-03-10 21:15:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29097 to 25771. [2021-03-10 21:15:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25771 states, 25770 states have (on average 2.566472642607683) internal successors, (66138), 25770 states have internal predecessors, (66138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25771 states to 25771 states and 66138 transitions. [2021-03-10 21:15:37,380 INFO L78 Accepts]: Start accepts. Automaton has 25771 states and 66138 transitions. Word has length 59 [2021-03-10 21:15:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:37,380 INFO L480 AbstractCegarLoop]: Abstraction has 25771 states and 66138 transitions. [2021-03-10 21:15:37,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 25771 states and 66138 transitions. [2021-03-10 21:15:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:37,394 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:37,394 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:37,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-03-10 21:15:37,594 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1934097086, now seen corresponding path program 248 times [2021-03-10 21:15:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:37,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961238603] [2021-03-10 21:15:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:37,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961238603] [2021-03-10 21:15:37,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541355073] [2021-03-10 21:15:37,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:37,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:37,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:37,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:37,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:37,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:15:37,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209112796] [2021-03-10 21:15:37,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:37,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:37,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:37,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:37,836 INFO L87 Difference]: Start difference. First operand 25771 states and 66138 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:38,121 INFO L93 Difference]: Finished difference Result 28231 states and 70881 transitions. [2021-03-10 21:15:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:38,153 INFO L225 Difference]: With dead ends: 28231 [2021-03-10 21:15:38,154 INFO L226 Difference]: Without dead ends: 28207 [2021-03-10 21:15:38,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:15:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28207 states. [2021-03-10 21:15:38,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28207 to 25414. [2021-03-10 21:15:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25414 states, 25413 states have (on average 2.5624286782355488) internal successors, (65119), 25413 states have internal predecessors, (65119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25414 states to 25414 states and 65119 transitions. [2021-03-10 21:15:38,502 INFO L78 Accepts]: Start accepts. Automaton has 25414 states and 65119 transitions. Word has length 59 [2021-03-10 21:15:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:38,502 INFO L480 AbstractCegarLoop]: Abstraction has 25414 states and 65119 transitions. [2021-03-10 21:15:38,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 25414 states and 65119 transitions. [2021-03-10 21:15:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:38,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:38,517 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:38,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-03-10 21:15:38,717 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:38,718 INFO L82 PathProgramCache]: Analyzing trace with hash 983147635, now seen corresponding path program 249 times [2021-03-10 21:15:38,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:38,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545575639] [2021-03-10 21:15:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:38,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545575639] [2021-03-10 21:15:38,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974006204] [2021-03-10 21:15:38,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:38,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 21:15:38,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:38,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:39,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:39,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:15:39,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768619473] [2021-03-10 21:15:39,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:15:39,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:39,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:15:39,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:15:39,017 INFO L87 Difference]: Start difference. First operand 25414 states and 65119 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:40,002 INFO L93 Difference]: Finished difference Result 29307 states and 73281 transitions. [2021-03-10 21:15:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:15:40,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:40,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:40,037 INFO L225 Difference]: With dead ends: 29307 [2021-03-10 21:15:40,037 INFO L226 Difference]: Without dead ends: 29253 [2021-03-10 21:15:40,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:15:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29253 states. [2021-03-10 21:15:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29253 to 25378. [2021-03-10 21:15:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25378 states, 25377 states have (on average 2.5608621980533552) internal successors, (64987), 25377 states have internal predecessors, (64987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25378 states to 25378 states and 64987 transitions. [2021-03-10 21:15:40,389 INFO L78 Accepts]: Start accepts. Automaton has 25378 states and 64987 transitions. Word has length 59 [2021-03-10 21:15:40,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:40,390 INFO L480 AbstractCegarLoop]: Abstraction has 25378 states and 64987 transitions. [2021-03-10 21:15:40,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 25378 states and 64987 transitions. [2021-03-10 21:15:40,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:40,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:40,404 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:40,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-03-10 21:15:40,604 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash 123205708, now seen corresponding path program 132 times [2021-03-10 21:15:40,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:40,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234046251] [2021-03-10 21:15:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:40,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234046251] [2021-03-10 21:15:40,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502471689] [2021-03-10 21:15:40,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:40,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-03-10 21:15:40,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:40,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:40,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:40,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:40,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:15:40,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128018816] [2021-03-10 21:15:40,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:40,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:40,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:40,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:40,867 INFO L87 Difference]: Start difference. First operand 25378 states and 64987 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:41,214 INFO L93 Difference]: Finished difference Result 36162 states and 88542 transitions. [2021-03-10 21:15:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:41,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:41,265 INFO L225 Difference]: With dead ends: 36162 [2021-03-10 21:15:41,265 INFO L226 Difference]: Without dead ends: 36162 [2021-03-10 21:15:41,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:15:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36162 states. [2021-03-10 21:15:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36162 to 25496. [2021-03-10 21:15:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25496 states, 25495 states have (on average 2.5630123553637967) internal successors, (65344), 25495 states have internal predecessors, (65344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25496 states to 25496 states and 65344 transitions. [2021-03-10 21:15:41,698 INFO L78 Accepts]: Start accepts. Automaton has 25496 states and 65344 transitions. Word has length 59 [2021-03-10 21:15:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:41,698 INFO L480 AbstractCegarLoop]: Abstraction has 25496 states and 65344 transitions. [2021-03-10 21:15:41,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 25496 states and 65344 transitions. [2021-03-10 21:15:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:41,713 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:41,713 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:41,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable889,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:41,913 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:41,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1514366748, now seen corresponding path program 133 times [2021-03-10 21:15:41,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:41,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526926784] [2021-03-10 21:15:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:42,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526926784] [2021-03-10 21:15:42,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970844992] [2021-03-10 21:15:42,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:42,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:42,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:42,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:42,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:15:42,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662416786] [2021-03-10 21:15:42,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:15:42,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:15:42,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:15:42,167 INFO L87 Difference]: Start difference. First operand 25496 states and 65344 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:42,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:42,561 INFO L93 Difference]: Finished difference Result 35758 states and 87548 transitions. [2021-03-10 21:15:42,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:15:42,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:42,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:42,603 INFO L225 Difference]: With dead ends: 35758 [2021-03-10 21:15:42,603 INFO L226 Difference]: Without dead ends: 35758 [2021-03-10 21:15:42,603 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35758 states. [2021-03-10 21:15:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35758 to 25518. [2021-03-10 21:15:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25518 states, 25517 states have (on average 2.563310734020457) internal successors, (65408), 25517 states have internal predecessors, (65408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25518 states to 25518 states and 65408 transitions. [2021-03-10 21:15:43,002 INFO L78 Accepts]: Start accepts. Automaton has 25518 states and 65408 transitions. Word has length 59 [2021-03-10 21:15:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:43,003 INFO L480 AbstractCegarLoop]: Abstraction has 25518 states and 65408 transitions. [2021-03-10 21:15:43,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 25518 states and 65408 transitions. [2021-03-10 21:15:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:43,018 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:43,018 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:43,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable890 [2021-03-10 21:15:43,218 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1090605384, now seen corresponding path program 134 times [2021-03-10 21:15:43,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:43,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433578064] [2021-03-10 21:15:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:43,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433578064] [2021-03-10 21:15:43,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205292593] [2021-03-10 21:15:43,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:15:43,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:43,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:43,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:43,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:43,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-03-10 21:15:43,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37486965] [2021-03-10 21:15:43,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:15:43,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:15:43,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:43,598 INFO L87 Difference]: Start difference. First operand 25518 states and 65408 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:44,010 INFO L93 Difference]: Finished difference Result 31600 states and 77846 transitions. [2021-03-10 21:15:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:15:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:44,047 INFO L225 Difference]: With dead ends: 31600 [2021-03-10 21:15:44,047 INFO L226 Difference]: Without dead ends: 31600 [2021-03-10 21:15:44,047 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31600 states. [2021-03-10 21:15:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31600 to 25209. [2021-03-10 21:15:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25209 states, 25208 states have (on average 2.558870199936528) internal successors, (64504), 25208 states have internal predecessors, (64504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25209 states to 25209 states and 64504 transitions. [2021-03-10 21:15:44,418 INFO L78 Accepts]: Start accepts. Automaton has 25209 states and 64504 transitions. Word has length 59 [2021-03-10 21:15:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:44,418 INFO L480 AbstractCegarLoop]: Abstraction has 25209 states and 64504 transitions. [2021-03-10 21:15:44,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 25209 states and 64504 transitions. [2021-03-10 21:15:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:44,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:44,433 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:44,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:44,633 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1369750312, now seen corresponding path program 250 times [2021-03-10 21:15:44,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:44,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035299363] [2021-03-10 21:15:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:44,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035299363] [2021-03-10 21:15:44,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660435153] [2021-03-10 21:15:44,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:44,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:44,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:44,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:44,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:15:44,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715425907] [2021-03-10 21:15:44,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:15:44,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:44,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:15:44,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:15:44,898 INFO L87 Difference]: Start difference. First operand 25209 states and 64504 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:45,314 INFO L93 Difference]: Finished difference Result 27418 states and 68804 transitions. [2021-03-10 21:15:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:45,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:45,345 INFO L225 Difference]: With dead ends: 27418 [2021-03-10 21:15:45,345 INFO L226 Difference]: Without dead ends: 27391 [2021-03-10 21:15:45,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:15:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27391 states. [2021-03-10 21:15:45,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27391 to 25209. [2021-03-10 21:15:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25209 states, 25208 states have (on average 2.558513170422088) internal successors, (64495), 25208 states have internal predecessors, (64495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25209 states to 25209 states and 64495 transitions. [2021-03-10 21:15:45,686 INFO L78 Accepts]: Start accepts. Automaton has 25209 states and 64495 transitions. Word has length 59 [2021-03-10 21:15:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:45,686 INFO L480 AbstractCegarLoop]: Abstraction has 25209 states and 64495 transitions. [2021-03-10 21:15:45,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 25209 states and 64495 transitions. [2021-03-10 21:15:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:45,701 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:45,701 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:45,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-03-10 21:15:45,902 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1823442059, now seen corresponding path program 135 times [2021-03-10 21:15:45,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:45,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862261028] [2021-03-10 21:15:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:46,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862261028] [2021-03-10 21:15:46,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592088093] [2021-03-10 21:15:46,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:46,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-03-10 21:15:46,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:46,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:46,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:15:46,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431811371] [2021-03-10 21:15:46,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:46,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:46,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:46,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:46,190 INFO L87 Difference]: Start difference. First operand 25209 states and 64495 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:46,941 INFO L93 Difference]: Finished difference Result 27577 states and 69376 transitions. [2021-03-10 21:15:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:46,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:46,974 INFO L225 Difference]: With dead ends: 27577 [2021-03-10 21:15:46,975 INFO L226 Difference]: Without dead ends: 27534 [2021-03-10 21:15:46,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:46,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27534 states. [2021-03-10 21:15:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27534 to 25380. [2021-03-10 21:15:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25380 states, 25379 states have (on average 2.5582568265101067) internal successors, (64926), 25379 states have internal predecessors, (64926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25380 states to 25380 states and 64926 transitions. [2021-03-10 21:15:47,330 INFO L78 Accepts]: Start accepts. Automaton has 25380 states and 64926 transitions. Word has length 59 [2021-03-10 21:15:47,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:47,330 INFO L480 AbstractCegarLoop]: Abstraction has 25380 states and 64926 transitions. [2021-03-10 21:15:47,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 25380 states and 64926 transitions. [2021-03-10 21:15:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:47,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:47,345 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:47,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:47,545 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash -323109067, now seen corresponding path program 251 times [2021-03-10 21:15:47,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:47,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997716808] [2021-03-10 21:15:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997716808] [2021-03-10 21:15:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645879618] [2021-03-10 21:15:47,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:47,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-03-10 21:15:47,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:47,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:47,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:47,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:47,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:15:47,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65590915] [2021-03-10 21:15:47,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:47,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:47,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:47,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:47,861 INFO L87 Difference]: Start difference. First operand 25380 states and 64926 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:48,894 INFO L93 Difference]: Finished difference Result 26542 states and 67117 transitions. [2021-03-10 21:15:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:48,925 INFO L225 Difference]: With dead ends: 26542 [2021-03-10 21:15:48,925 INFO L226 Difference]: Without dead ends: 26466 [2021-03-10 21:15:48,925 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26466 states. [2021-03-10 21:15:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26466 to 25473. [2021-03-10 21:15:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25473 states, 25472 states have (on average 2.5550408291457285) internal successors, (65082), 25472 states have internal predecessors, (65082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25473 states to 25473 states and 65082 transitions. [2021-03-10 21:15:49,263 INFO L78 Accepts]: Start accepts. Automaton has 25473 states and 65082 transitions. Word has length 59 [2021-03-10 21:15:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:49,263 INFO L480 AbstractCegarLoop]: Abstraction has 25473 states and 65082 transitions. [2021-03-10 21:15:49,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 25473 states and 65082 transitions. [2021-03-10 21:15:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:49,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:49,278 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:49,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable898 [2021-03-10 21:15:49,479 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:49,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:49,479 INFO L82 PathProgramCache]: Analyzing trace with hash -936645247, now seen corresponding path program 252 times [2021-03-10 21:15:49,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:49,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709585284] [2021-03-10 21:15:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:49,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709585284] [2021-03-10 21:15:49,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049135583] [2021-03-10 21:15:49,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:49,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-03-10 21:15:49,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:49,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:49,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:15:49,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229974782] [2021-03-10 21:15:49,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:49,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:49,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:49,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:49,850 INFO L87 Difference]: Start difference. First operand 25473 states and 65082 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:50,592 INFO L93 Difference]: Finished difference Result 27214 states and 68571 transitions. [2021-03-10 21:15:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:50,625 INFO L225 Difference]: With dead ends: 27214 [2021-03-10 21:15:50,625 INFO L226 Difference]: Without dead ends: 27169 [2021-03-10 21:15:50,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27169 states. [2021-03-10 21:15:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27169 to 25427. [2021-03-10 21:15:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25427 states, 25426 states have (on average 2.5551010776370644) internal successors, (64966), 25426 states have internal predecessors, (64966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25427 states to 25427 states and 64966 transitions. [2021-03-10 21:15:50,965 INFO L78 Accepts]: Start accepts. Automaton has 25427 states and 64966 transitions. Word has length 59 [2021-03-10 21:15:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:50,966 INFO L480 AbstractCegarLoop]: Abstraction has 25427 states and 64966 transitions. [2021-03-10 21:15:50,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 25427 states and 64966 transitions. [2021-03-10 21:15:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:50,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:50,980 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:51,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable899,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:51,180 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1709964546, now seen corresponding path program 253 times [2021-03-10 21:15:51,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:51,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894475985] [2021-03-10 21:15:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:51,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894475985] [2021-03-10 21:15:51,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532004192] [2021-03-10 21:15:51,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:51,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:51,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:51,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:51,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:15:51,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007265915] [2021-03-10 21:15:51,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:15:51,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:51,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:15:51,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:51,410 INFO L87 Difference]: Start difference. First operand 25427 states and 64966 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:51,732 INFO L93 Difference]: Finished difference Result 28233 states and 70403 transitions. [2021-03-10 21:15:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:51,733 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:51,766 INFO L225 Difference]: With dead ends: 28233 [2021-03-10 21:15:51,766 INFO L226 Difference]: Without dead ends: 28215 [2021-03-10 21:15:51,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28215 states. [2021-03-10 21:15:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28215 to 25276. [2021-03-10 21:15:52,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25276 states, 25275 states have (on average 2.5537883283877347) internal successors, (64547), 25275 states have internal predecessors, (64547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25276 states to 25276 states and 64547 transitions. [2021-03-10 21:15:52,102 INFO L78 Accepts]: Start accepts. Automaton has 25276 states and 64547 transitions. Word has length 59 [2021-03-10 21:15:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:52,102 INFO L480 AbstractCegarLoop]: Abstraction has 25276 states and 64547 transitions. [2021-03-10 21:15:52,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 25276 states and 64547 transitions. [2021-03-10 21:15:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:52,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:52,116 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:52,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:52,316 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1205272087, now seen corresponding path program 254 times [2021-03-10 21:15:52,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:52,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950440153] [2021-03-10 21:15:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:52,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950440153] [2021-03-10 21:15:52,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450798344] [2021-03-10 21:15:52,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:52,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:52,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:52,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:52,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:52,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:52,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:15:52,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47504217] [2021-03-10 21:15:52,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:52,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:52,586 INFO L87 Difference]: Start difference. First operand 25276 states and 64547 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:53,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:53,601 INFO L93 Difference]: Finished difference Result 29095 states and 72693 transitions. [2021-03-10 21:15:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:15:53,602 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:53,636 INFO L225 Difference]: With dead ends: 29095 [2021-03-10 21:15:53,637 INFO L226 Difference]: Without dead ends: 29041 [2021-03-10 21:15:53,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:15:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29041 states. [2021-03-10 21:15:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29041 to 25454. [2021-03-10 21:15:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25454 states, 25453 states have (on average 2.5548658311397476) internal successors, (65029), 25453 states have internal predecessors, (65029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:54,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25454 states to 25454 states and 65029 transitions. [2021-03-10 21:15:54,070 INFO L78 Accepts]: Start accepts. Automaton has 25454 states and 65029 transitions. Word has length 59 [2021-03-10 21:15:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:54,070 INFO L480 AbstractCegarLoop]: Abstraction has 25454 states and 65029 transitions. [2021-03-10 21:15:54,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:54,070 INFO L276 IsEmpty]: Start isEmpty. Operand 25454 states and 65029 transitions. [2021-03-10 21:15:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:54,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:54,085 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:54,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-03-10 21:15:54,285 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:54,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1557136100, now seen corresponding path program 255 times [2021-03-10 21:15:54,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:54,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331093921] [2021-03-10 21:15:54,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:54,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331093921] [2021-03-10 21:15:54,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304435809] [2021-03-10 21:15:54,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:54,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 21:15:54,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:54,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:54,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:54,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:54,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:15:54,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377999274] [2021-03-10 21:15:54,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:15:54,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:15:54,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:54,545 INFO L87 Difference]: Start difference. First operand 25454 states and 65029 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:54,892 INFO L93 Difference]: Finished difference Result 28434 states and 70864 transitions. [2021-03-10 21:15:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:15:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:54,927 INFO L225 Difference]: With dead ends: 28434 [2021-03-10 21:15:54,927 INFO L226 Difference]: Without dead ends: 28410 [2021-03-10 21:15:54,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:15:54,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28410 states. [2021-03-10 21:15:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28410 to 25454. [2021-03-10 21:15:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25454 states, 25453 states have (on average 2.554197933445959) internal successors, (65012), 25453 states have internal predecessors, (65012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25454 states to 25454 states and 65012 transitions. [2021-03-10 21:15:55,278 INFO L78 Accepts]: Start accepts. Automaton has 25454 states and 65012 transitions. Word has length 59 [2021-03-10 21:15:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:55,279 INFO L480 AbstractCegarLoop]: Abstraction has 25454 states and 65012 transitions. [2021-03-10 21:15:55,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 25454 states and 65012 transitions. [2021-03-10 21:15:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:55,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:55,293 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:55,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:55,493 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1360108621, now seen corresponding path program 256 times [2021-03-10 21:15:55,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:55,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209144808] [2021-03-10 21:15:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:55,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209144808] [2021-03-10 21:15:55,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535420334] [2021-03-10 21:15:55,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:55,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:55,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:55,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:55,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:55,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:55,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:15:55,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475299571] [2021-03-10 21:15:55,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:15:55,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:55,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:15:55,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:15:55,770 INFO L87 Difference]: Start difference. First operand 25454 states and 65012 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:57,018 INFO L93 Difference]: Finished difference Result 32250 states and 79841 transitions. [2021-03-10 21:15:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:15:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:57,057 INFO L225 Difference]: With dead ends: 32250 [2021-03-10 21:15:57,057 INFO L226 Difference]: Without dead ends: 32136 [2021-03-10 21:15:57,057 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 436.4ms TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:15:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32136 states. [2021-03-10 21:15:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32136 to 25642. [2021-03-10 21:15:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25642 states, 25641 states have (on average 2.5557895557895556) internal successors, (65533), 25641 states have internal predecessors, (65533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25642 states to 25642 states and 65533 transitions. [2021-03-10 21:15:57,419 INFO L78 Accepts]: Start accepts. Automaton has 25642 states and 65533 transitions. Word has length 59 [2021-03-10 21:15:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:57,420 INFO L480 AbstractCegarLoop]: Abstraction has 25642 states and 65533 transitions. [2021-03-10 21:15:57,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 25642 states and 65533 transitions. [2021-03-10 21:15:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:57,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:57,433 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:57,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable908,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:57,634 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:57,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:57,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1746711298, now seen corresponding path program 257 times [2021-03-10 21:15:57,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:57,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106477962] [2021-03-10 21:15:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:57,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106477962] [2021-03-10 21:15:57,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532712189] [2021-03-10 21:15:57,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:57,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:15:57,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:15:57,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:57,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:57,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 18 [2021-03-10 21:15:57,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622964887] [2021-03-10 21:15:57,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:15:57,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:57,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:15:57,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:15:57,932 INFO L87 Difference]: Start difference. First operand 25642 states and 65533 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:58,325 INFO L93 Difference]: Finished difference Result 28882 states and 71918 transitions. [2021-03-10 21:15:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:15:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:15:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:58,358 INFO L225 Difference]: With dead ends: 28882 [2021-03-10 21:15:58,358 INFO L226 Difference]: Without dead ends: 28849 [2021-03-10 21:15:58,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28849 states. [2021-03-10 21:15:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28849 to 25297. [2021-03-10 21:15:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25297 states, 25296 states have (on average 2.552063567362429) internal successors, (64557), 25296 states have internal predecessors, (64557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25297 states to 25297 states and 64557 transitions. [2021-03-10 21:15:58,759 INFO L78 Accepts]: Start accepts. Automaton has 25297 states and 64557 transitions. Word has length 59 [2021-03-10 21:15:58,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:58,759 INFO L480 AbstractCegarLoop]: Abstraction has 25297 states and 64557 transitions. [2021-03-10 21:15:58,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 25297 states and 64557 transitions. [2021-03-10 21:15:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:15:58,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:58,773 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:58,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-03-10 21:15:58,973 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:58,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1300417111, now seen corresponding path program 258 times [2021-03-10 21:15:58,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:58,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038056858] [2021-03-10 21:15:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:59,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038056858] [2021-03-10 21:15:59,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120970924] [2021-03-10 21:15:59,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:59,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-03-10 21:15:59,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:59,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:15:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:59,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:59,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:15:59,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103902691] [2021-03-10 21:15:59,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:15:59,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:59,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:15:59,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:59,264 INFO L87 Difference]: Start difference. First operand 25297 states and 64557 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:00,263 INFO L93 Difference]: Finished difference Result 30804 states and 76252 transitions. [2021-03-10 21:16:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:00,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:00,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:00,300 INFO L225 Difference]: With dead ends: 30804 [2021-03-10 21:16:00,301 INFO L226 Difference]: Without dead ends: 30648 [2021-03-10 21:16:00,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:16:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30648 states. [2021-03-10 21:16:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30648 to 24896. [2021-03-10 21:16:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24896 states, 24895 states have (on average 2.5465756175938945) internal successors, (63397), 24895 states have internal predecessors, (63397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24896 states to 24896 states and 63397 transitions. [2021-03-10 21:16:00,662 INFO L78 Accepts]: Start accepts. Automaton has 24896 states and 63397 transitions. Word has length 59 [2021-03-10 21:16:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:00,662 INFO L480 AbstractCegarLoop]: Abstraction has 24896 states and 63397 transitions. [2021-03-10 21:16:00,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24896 states and 63397 transitions. [2021-03-10 21:16:00,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:00,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:00,678 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:00,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable914,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:00,878 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:00,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1062355594, now seen corresponding path program 136 times [2021-03-10 21:16:00,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:00,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118768330] [2021-03-10 21:16:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:00,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118768330] [2021-03-10 21:16:00,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703401204] [2021-03-10 21:16:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:00,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:00,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:00,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:00,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:01,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:01,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:16:01,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730657161] [2021-03-10 21:16:01,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:16:01,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:01,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:16:01,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:01,126 INFO L87 Difference]: Start difference. First operand 24896 states and 63397 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:01,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:01,440 INFO L93 Difference]: Finished difference Result 29677 states and 73019 transitions. [2021-03-10 21:16:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:16:01,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:01,475 INFO L225 Difference]: With dead ends: 29677 [2021-03-10 21:16:01,475 INFO L226 Difference]: Without dead ends: 29663 [2021-03-10 21:16:01,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:01,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29663 states. [2021-03-10 21:16:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29663 to 25237. [2021-03-10 21:16:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25237 states, 25236 states have (on average 2.5500871770486606) internal successors, (64354), 25236 states have internal predecessors, (64354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25237 states to 25237 states and 64354 transitions. [2021-03-10 21:16:01,828 INFO L78 Accepts]: Start accepts. Automaton has 25237 states and 64354 transitions. Word has length 59 [2021-03-10 21:16:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:01,828 INFO L480 AbstractCegarLoop]: Abstraction has 25237 states and 64354 transitions. [2021-03-10 21:16:01,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 25237 states and 64354 transitions. [2021-03-10 21:16:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:01,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:01,843 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:02,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:02,043 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash 440475184, now seen corresponding path program 137 times [2021-03-10 21:16:02,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:02,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760576670] [2021-03-10 21:16:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:02,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760576670] [2021-03-10 21:16:02,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953149598] [2021-03-10 21:16:02,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:02,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-03-10 21:16:02,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:02,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:02,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:02,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-03-10 21:16:02,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997497254] [2021-03-10 21:16:02,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:16:02,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:16:02,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:02,306 INFO L87 Difference]: Start difference. First operand 25237 states and 64354 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:02,719 INFO L93 Difference]: Finished difference Result 37067 states and 90461 transitions. [2021-03-10 21:16:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:16:02,720 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:02,834 INFO L225 Difference]: With dead ends: 37067 [2021-03-10 21:16:02,834 INFO L226 Difference]: Without dead ends: 37067 [2021-03-10 21:16:02,834 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37067 states. [2021-03-10 21:16:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37067 to 25251. [2021-03-10 21:16:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25251 states, 25250 states have (on average 2.5503366336633664) internal successors, (64396), 25250 states have internal predecessors, (64396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25251 states to 25251 states and 64396 transitions. [2021-03-10 21:16:03,181 INFO L78 Accepts]: Start accepts. Automaton has 25251 states and 64396 transitions. Word has length 59 [2021-03-10 21:16:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:03,181 INFO L480 AbstractCegarLoop]: Abstraction has 25251 states and 64396 transitions. [2021-03-10 21:16:03,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 25251 states and 64396 transitions. [2021-03-10 21:16:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:03,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:03,196 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:03,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable917,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:03,396 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:03,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1197097272, now seen corresponding path program 138 times [2021-03-10 21:16:03,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:03,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653559614] [2021-03-10 21:16:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 131 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:03,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653559614] [2021-03-10 21:16:03,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400941131] [2021-03-10 21:16:03,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:03,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-03-10 21:16:03,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:03,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:03,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 132 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:03,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:03,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:16:03,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505687109] [2021-03-10 21:16:03,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:16:03,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:03,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:16:03,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:03,652 INFO L87 Difference]: Start difference. First operand 25251 states and 64396 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:04,089 INFO L93 Difference]: Finished difference Result 38843 states and 94736 transitions. [2021-03-10 21:16:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:16:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:04,136 INFO L225 Difference]: With dead ends: 38843 [2021-03-10 21:16:04,136 INFO L226 Difference]: Without dead ends: 38843 [2021-03-10 21:16:04,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:04,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38843 states. [2021-03-10 21:16:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38843 to 25289. [2021-03-10 21:16:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25289 states, 25288 states have (on average 2.551170515659601) internal successors, (64514), 25288 states have internal predecessors, (64514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 64514 transitions. [2021-03-10 21:16:04,531 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 64514 transitions. Word has length 59 [2021-03-10 21:16:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:04,531 INFO L480 AbstractCegarLoop]: Abstraction has 25289 states and 64514 transitions. [2021-03-10 21:16:04,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 64514 transitions. [2021-03-10 21:16:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:04,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:04,546 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:04,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable918 [2021-03-10 21:16:04,746 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1407874860, now seen corresponding path program 139 times [2021-03-10 21:16:04,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:04,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382462936] [2021-03-10 21:16:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 118 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:04,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382462936] [2021-03-10 21:16:04,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847385257] [2021-03-10 21:16:04,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:04,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:04,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 119 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:05,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:05,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-03-10 21:16:05,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603219681] [2021-03-10 21:16:05,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:16:05,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:05,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:16:05,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:05,012 INFO L87 Difference]: Start difference. First operand 25289 states and 64514 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:05,498 INFO L93 Difference]: Finished difference Result 36124 states and 88274 transitions. [2021-03-10 21:16:05,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:16:05,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:05,540 INFO L225 Difference]: With dead ends: 36124 [2021-03-10 21:16:05,540 INFO L226 Difference]: Without dead ends: 36124 [2021-03-10 21:16:05,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:05,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36124 states. [2021-03-10 21:16:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36124 to 25321. [2021-03-10 21:16:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25321 states, 25320 states have (on average 2.551658767772512) internal successors, (64608), 25320 states have internal predecessors, (64608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25321 states to 25321 states and 64608 transitions. [2021-03-10 21:16:05,927 INFO L78 Accepts]: Start accepts. Automaton has 25321 states and 64608 transitions. Word has length 59 [2021-03-10 21:16:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:05,927 INFO L480 AbstractCegarLoop]: Abstraction has 25321 states and 64608 transitions. [2021-03-10 21:16:05,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 25321 states and 64608 transitions. [2021-03-10 21:16:05,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:05,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:05,942 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:06,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-03-10 21:16:06,142 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash 368587848, now seen corresponding path program 140 times [2021-03-10 21:16:06,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:06,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451905312] [2021-03-10 21:16:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:06,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451905312] [2021-03-10 21:16:06,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080740928] [2021-03-10 21:16:06,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:06,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:06,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:06,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:06,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:06,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:06,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-03-10 21:16:06,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850346471] [2021-03-10 21:16:06,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:06,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:06,520 INFO L87 Difference]: Start difference. First operand 25321 states and 64608 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:06,943 INFO L93 Difference]: Finished difference Result 31083 states and 76490 transitions. [2021-03-10 21:16:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:16:06,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:06,980 INFO L225 Difference]: With dead ends: 31083 [2021-03-10 21:16:06,981 INFO L226 Difference]: Without dead ends: 31083 [2021-03-10 21:16:06,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31083 states. [2021-03-10 21:16:07,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31083 to 24935. [2021-03-10 21:16:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24935 states, 24934 states have (on average 2.5468436672816237) internal successors, (63503), 24934 states have internal predecessors, (63503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24935 states to 24935 states and 63503 transitions. [2021-03-10 21:16:07,326 INFO L78 Accepts]: Start accepts. Automaton has 24935 states and 63503 transitions. Word has length 59 [2021-03-10 21:16:07,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:07,326 INFO L480 AbstractCegarLoop]: Abstraction has 24935 states and 63503 transitions. [2021-03-10 21:16:07,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 24935 states and 63503 transitions. [2021-03-10 21:16:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:07,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:07,341 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:07,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable920 [2021-03-10 21:16:07,541 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:07,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1100977316, now seen corresponding path program 259 times [2021-03-10 21:16:07,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:07,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45159379] [2021-03-10 21:16:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:07,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45159379] [2021-03-10 21:16:07,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996860228] [2021-03-10 21:16:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:07,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:07,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:07,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:07,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 21:16:07,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65153928] [2021-03-10 21:16:07,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:16:07,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:07,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:16:07,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:07,811 INFO L87 Difference]: Start difference. First operand 24935 states and 63503 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:08,167 INFO L93 Difference]: Finished difference Result 27618 states and 68802 transitions. [2021-03-10 21:16:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:16:08,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:08,199 INFO L225 Difference]: With dead ends: 27618 [2021-03-10 21:16:08,200 INFO L226 Difference]: Without dead ends: 27582 [2021-03-10 21:16:08,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2021-03-10 21:16:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 24935. [2021-03-10 21:16:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24935 states, 24934 states have (on average 2.54636239672736) internal successors, (63491), 24934 states have internal predecessors, (63491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24935 states to 24935 states and 63491 transitions. [2021-03-10 21:16:08,527 INFO L78 Accepts]: Start accepts. Automaton has 24935 states and 63491 transitions. Word has length 59 [2021-03-10 21:16:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:08,527 INFO L480 AbstractCegarLoop]: Abstraction has 24935 states and 63491 transitions. [2021-03-10 21:16:08,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 24935 states and 63491 transitions. [2021-03-10 21:16:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:08,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:08,541 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:08,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-03-10 21:16:08,741 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:08,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1176780123, now seen corresponding path program 141 times [2021-03-10 21:16:08,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:08,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938231017] [2021-03-10 21:16:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:08,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938231017] [2021-03-10 21:16:08,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456428579] [2021-03-10 21:16:08,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:08,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-03-10 21:16:08,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:08,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:08,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:09,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:09,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:16:09,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916330442] [2021-03-10 21:16:09,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:09,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:09,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:09,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:09,022 INFO L87 Difference]: Start difference. First operand 24935 states and 63491 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:09,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:09,751 INFO L93 Difference]: Finished difference Result 27040 states and 67819 transitions. [2021-03-10 21:16:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:09,752 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:09,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:09,784 INFO L225 Difference]: With dead ends: 27040 [2021-03-10 21:16:09,785 INFO L226 Difference]: Without dead ends: 27005 [2021-03-10 21:16:09,785 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27005 states. [2021-03-10 21:16:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27005 to 25020. [2021-03-10 21:16:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25020 states, 25019 states have (on average 2.5463447779687436) internal successors, (63707), 25019 states have internal predecessors, (63707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25020 states to 25020 states and 63707 transitions. [2021-03-10 21:16:10,120 INFO L78 Accepts]: Start accepts. Automaton has 25020 states and 63707 transitions. Word has length 59 [2021-03-10 21:16:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:10,120 INFO L480 AbstractCegarLoop]: Abstraction has 25020 states and 63707 transitions. [2021-03-10 21:16:10,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 25020 states and 63707 transitions. [2021-03-10 21:16:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:10,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:10,135 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:10,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:10,335 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash -376916734, now seen corresponding path program 260 times [2021-03-10 21:16:10,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:10,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356568172] [2021-03-10 21:16:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 113 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:10,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356568172] [2021-03-10 21:16:10,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820965586] [2021-03-10 21:16:10,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:10,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:10,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:10,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 113 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:10,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:10,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:16:10,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356324820] [2021-03-10 21:16:10,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:10,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:10,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:10,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:10,657 INFO L87 Difference]: Start difference. First operand 25020 states and 63707 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:10,909 INFO L93 Difference]: Finished difference Result 28168 states and 69936 transitions. [2021-03-10 21:16:10,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:16:10,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:10,942 INFO L225 Difference]: With dead ends: 28168 [2021-03-10 21:16:10,942 INFO L226 Difference]: Without dead ends: 28165 [2021-03-10 21:16:10,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28165 states. [2021-03-10 21:16:11,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28165 to 25006. [2021-03-10 21:16:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25006 states, 25005 states have (on average 2.5455708858228356) internal successors, (63652), 25005 states have internal predecessors, (63652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25006 states to 25006 states and 63652 transitions. [2021-03-10 21:16:11,283 INFO L78 Accepts]: Start accepts. Automaton has 25006 states and 63652 transitions. Word has length 59 [2021-03-10 21:16:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:11,283 INFO L480 AbstractCegarLoop]: Abstraction has 25006 states and 63652 transitions. [2021-03-10 21:16:11,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 25006 states and 63652 transitions. [2021-03-10 21:16:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:11,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:11,298 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:11,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:11,498 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:11,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:11,498 INFO L82 PathProgramCache]: Analyzing trace with hash -169854168, now seen corresponding path program 261 times [2021-03-10 21:16:11,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:11,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758381077] [2021-03-10 21:16:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 119 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:11,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758381077] [2021-03-10 21:16:11,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118539489] [2021-03-10 21:16:11,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:11,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-03-10 21:16:11,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:11,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:11,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 119 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:11,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:11,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:16:11,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307248171] [2021-03-10 21:16:11,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:11,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:11,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:11,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:11,736 INFO L87 Difference]: Start difference. First operand 25006 states and 63652 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:12,005 INFO L93 Difference]: Finished difference Result 28190 states and 69930 transitions. [2021-03-10 21:16:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:16:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:12,040 INFO L225 Difference]: With dead ends: 28190 [2021-03-10 21:16:12,040 INFO L226 Difference]: Without dead ends: 28172 [2021-03-10 21:16:12,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:12,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28172 states. [2021-03-10 21:16:12,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28172 to 25006. [2021-03-10 21:16:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25006 states, 25005 states have (on average 2.5447710457908417) internal successors, (63632), 25005 states have internal predecessors, (63632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25006 states to 25006 states and 63632 transitions. [2021-03-10 21:16:12,400 INFO L78 Accepts]: Start accepts. Automaton has 25006 states and 63632 transitions. Word has length 59 [2021-03-10 21:16:12,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:12,400 INFO L480 AbstractCegarLoop]: Abstraction has 25006 states and 63632 transitions. [2021-03-10 21:16:12,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 25006 states and 63632 transitions. [2021-03-10 21:16:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:12,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:12,415 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:12,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable930 [2021-03-10 21:16:12,627 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:12,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1617854181, now seen corresponding path program 262 times [2021-03-10 21:16:12,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:12,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971662222] [2021-03-10 21:16:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:12,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971662222] [2021-03-10 21:16:12,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677937060] [2021-03-10 21:16:12,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:12,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:12,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:12,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:12,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:12,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:12,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:16:12,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118882296] [2021-03-10 21:16:12,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:12,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:12,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:12,924 INFO L87 Difference]: Start difference. First operand 25006 states and 63632 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:13,920 INFO L93 Difference]: Finished difference Result 26195 states and 65912 transitions. [2021-03-10 21:16:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:13,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:13,952 INFO L225 Difference]: With dead ends: 26195 [2021-03-10 21:16:13,952 INFO L226 Difference]: Without dead ends: 26101 [2021-03-10 21:16:13,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26101 states. [2021-03-10 21:16:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26101 to 25156. [2021-03-10 21:16:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25156 states, 25155 states have (on average 2.541125024845955) internal successors, (63922), 25155 states have internal predecessors, (63922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25156 states to 25156 states and 63922 transitions. [2021-03-10 21:16:14,285 INFO L78 Accepts]: Start accepts. Automaton has 25156 states and 63922 transitions. Word has length 59 [2021-03-10 21:16:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:14,285 INFO L480 AbstractCegarLoop]: Abstraction has 25156 states and 63922 transitions. [2021-03-10 21:16:14,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 25156 states and 63922 transitions. [2021-03-10 21:16:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:14,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:14,300 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:14,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable933 [2021-03-10 21:16:14,501 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2063576935, now seen corresponding path program 263 times [2021-03-10 21:16:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:14,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787153460] [2021-03-10 21:16:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:14,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787153460] [2021-03-10 21:16:14,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266167774] [2021-03-10 21:16:14,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:14,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-03-10 21:16:14,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:14,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:14,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:16:14,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786580995] [2021-03-10 21:16:14,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:14,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:14,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:14,865 INFO L87 Difference]: Start difference. First operand 25156 states and 63922 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:15,604 INFO L93 Difference]: Finished difference Result 26924 states and 67481 transitions. [2021-03-10 21:16:15,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:15,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:15,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:15,635 INFO L225 Difference]: With dead ends: 26924 [2021-03-10 21:16:15,636 INFO L226 Difference]: Without dead ends: 26870 [2021-03-10 21:16:15,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:15,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26870 states. [2021-03-10 21:16:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26870 to 25174. [2021-03-10 21:16:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25174 states, 25173 states have (on average 2.5411353434235093) internal successors, (63968), 25173 states have internal predecessors, (63968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25174 states to 25174 states and 63968 transitions. [2021-03-10 21:16:15,968 INFO L78 Accepts]: Start accepts. Automaton has 25174 states and 63968 transitions. Word has length 59 [2021-03-10 21:16:15,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:15,968 INFO L480 AbstractCegarLoop]: Abstraction has 25174 states and 63968 transitions. [2021-03-10 21:16:15,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 25174 states and 63968 transitions. [2021-03-10 21:16:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:15,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:15,983 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:16,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable934,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:16,183 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:16,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:16,184 INFO L82 PathProgramCache]: Analyzing trace with hash -89473027, now seen corresponding path program 264 times [2021-03-10 21:16:16,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:16,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506867972] [2021-03-10 21:16:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:16,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506867972] [2021-03-10 21:16:16,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55048857] [2021-03-10 21:16:16,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:16,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-03-10 21:16:16,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:16,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:16,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:16,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:16,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:16:16,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567222801] [2021-03-10 21:16:16,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:16:16,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:16,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:16:16,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:16,454 INFO L87 Difference]: Start difference. First operand 25174 states and 63968 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:17,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:17,511 INFO L93 Difference]: Finished difference Result 28986 states and 72048 transitions. [2021-03-10 21:16:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:16:17,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:17,545 INFO L225 Difference]: With dead ends: 28986 [2021-03-10 21:16:17,545 INFO L226 Difference]: Without dead ends: 28932 [2021-03-10 21:16:17,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:16:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28932 states. [2021-03-10 21:16:17,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28932 to 25413. [2021-03-10 21:16:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25413 states, 25412 states have (on average 2.5427357154100423) internal successors, (64616), 25412 states have internal predecessors, (64616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:17,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25413 states to 25413 states and 64616 transitions. [2021-03-10 21:16:17,888 INFO L78 Accepts]: Start accepts. Automaton has 25413 states and 64616 transitions. Word has length 59 [2021-03-10 21:16:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:17,888 INFO L480 AbstractCegarLoop]: Abstraction has 25413 states and 64616 transitions. [2021-03-10 21:16:17,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 25413 states and 64616 transitions. [2021-03-10 21:16:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:17,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:17,902 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:18,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-03-10 21:16:18,103 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:18,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:18,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1443086082, now seen corresponding path program 265 times [2021-03-10 21:16:18,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:18,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344845240] [2021-03-10 21:16:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:18,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344845240] [2021-03-10 21:16:18,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50890625] [2021-03-10 21:16:18,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:18,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:18,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:18,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:16:18,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534260405] [2021-03-10 21:16:18,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:16:18,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:16:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:18,346 INFO L87 Difference]: Start difference. First operand 25413 states and 64616 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:18,630 INFO L93 Difference]: Finished difference Result 28694 states and 71095 transitions. [2021-03-10 21:16:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:16:18,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:18,664 INFO L225 Difference]: With dead ends: 28694 [2021-03-10 21:16:18,664 INFO L226 Difference]: Without dead ends: 28670 [2021-03-10 21:16:18,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28670 states. [2021-03-10 21:16:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28670 to 25413. [2021-03-10 21:16:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25413 states, 25412 states have (on average 2.542184794585235) internal successors, (64602), 25412 states have internal predecessors, (64602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25413 states to 25413 states and 64602 transitions. [2021-03-10 21:16:19,073 INFO L78 Accepts]: Start accepts. Automaton has 25413 states and 64602 transitions. Word has length 59 [2021-03-10 21:16:19,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:19,073 INFO L480 AbstractCegarLoop]: Abstraction has 25413 states and 64602 transitions. [2021-03-10 21:16:19,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 25413 states and 64602 transitions. [2021-03-10 21:16:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:19,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:19,088 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:19,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable936 [2021-03-10 21:16:19,289 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:19,289 INFO L82 PathProgramCache]: Analyzing trace with hash 65363507, now seen corresponding path program 266 times [2021-03-10 21:16:19,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:19,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933904811] [2021-03-10 21:16:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:19,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933904811] [2021-03-10 21:16:19,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671493477] [2021-03-10 21:16:19,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:19,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:19,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:19,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:19,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:16:19,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20683314] [2021-03-10 21:16:19,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:16:19,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:16:19,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:19,571 INFO L87 Difference]: Start difference. First operand 25413 states and 64602 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:20,964 INFO L93 Difference]: Finished difference Result 33467 states and 82122 transitions. [2021-03-10 21:16:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:16:20,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:21,006 INFO L225 Difference]: With dead ends: 33467 [2021-03-10 21:16:21,006 INFO L226 Difference]: Without dead ends: 33287 [2021-03-10 21:16:21,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:16:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33287 states. [2021-03-10 21:16:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33287 to 25832. [2021-03-10 21:16:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25832 states, 25831 states have (on average 2.544578219968255) internal successors, (65729), 25831 states have internal predecessors, (65729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25832 states to 25832 states and 65729 transitions. [2021-03-10 21:16:21,378 INFO L78 Accepts]: Start accepts. Automaton has 25832 states and 65729 transitions. Word has length 59 [2021-03-10 21:16:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:21,378 INFO L480 AbstractCegarLoop]: Abstraction has 25832 states and 65729 transitions. [2021-03-10 21:16:21,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 25832 states and 65729 transitions. [2021-03-10 21:16:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:21,393 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:21,393 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:21,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable940,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:21,593 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:21,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:21,594 INFO L82 PathProgramCache]: Analyzing trace with hash 451966184, now seen corresponding path program 267 times [2021-03-10 21:16:21,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:21,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047329040] [2021-03-10 21:16:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:21,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047329040] [2021-03-10 21:16:21,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005211677] [2021-03-10 21:16:21,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:21,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 21:16:21,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:21,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:21,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:21,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:21,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:16:21,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139130437] [2021-03-10 21:16:21,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:16:21,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:21,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:16:21,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:21,862 INFO L87 Difference]: Start difference. First operand 25832 states and 65729 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:22,221 INFO L93 Difference]: Finished difference Result 29246 states and 72456 transitions. [2021-03-10 21:16:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:16:22,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:22,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:22,259 INFO L225 Difference]: With dead ends: 29246 [2021-03-10 21:16:22,259 INFO L226 Difference]: Without dead ends: 29213 [2021-03-10 21:16:22,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:16:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29213 states. [2021-03-10 21:16:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29213 to 25832. [2021-03-10 21:16:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25832 states, 25831 states have (on average 2.544229801401417) internal successors, (65720), 25831 states have internal predecessors, (65720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25832 states to 25832 states and 65720 transitions. [2021-03-10 21:16:22,647 INFO L78 Accepts]: Start accepts. Automaton has 25832 states and 65720 transitions. Word has length 59 [2021-03-10 21:16:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:22,647 INFO L480 AbstractCegarLoop]: Abstraction has 25832 states and 65720 transitions. [2021-03-10 21:16:22,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25832 states and 65720 transitions. [2021-03-10 21:16:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:22,662 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:22,662 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:22,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-03-10 21:16:22,879 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:22,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:22,879 INFO L82 PathProgramCache]: Analyzing trace with hash 5671997, now seen corresponding path program 268 times [2021-03-10 21:16:22,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:22,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650270322] [2021-03-10 21:16:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:23,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650270322] [2021-03-10 21:16:23,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432782176] [2021-03-10 21:16:23,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:23,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:23,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:23,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:23,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:23,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:23,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:16:23,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040502396] [2021-03-10 21:16:23,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:16:23,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:23,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:16:23,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:23,241 INFO L87 Difference]: Start difference. First operand 25832 states and 65720 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:25,162 INFO L93 Difference]: Finished difference Result 39206 states and 95366 transitions. [2021-03-10 21:16:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 21:16:25,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:25,208 INFO L225 Difference]: With dead ends: 39206 [2021-03-10 21:16:25,208 INFO L226 Difference]: Without dead ends: 38930 [2021-03-10 21:16:25,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 955.1ms TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:16:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38930 states. [2021-03-10 21:16:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38930 to 26140. [2021-03-10 21:16:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26140 states, 26139 states have (on average 2.5464631393702897) internal successors, (66562), 26139 states have internal predecessors, (66562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26140 states to 26140 states and 66562 transitions. [2021-03-10 21:16:25,628 INFO L78 Accepts]: Start accepts. Automaton has 26140 states and 66562 transitions. Word has length 59 [2021-03-10 21:16:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:25,628 INFO L480 AbstractCegarLoop]: Abstraction has 26140 states and 66562 transitions. [2021-03-10 21:16:25,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 26140 states and 66562 transitions. [2021-03-10 21:16:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:25,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:25,643 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:25,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable946,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:25,843 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:25,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1899244866, now seen corresponding path program 269 times [2021-03-10 21:16:25,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:25,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974271774] [2021-03-10 21:16:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:25,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974271774] [2021-03-10 21:16:25,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194551129] [2021-03-10 21:16:25,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:25,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:16:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:26,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:26,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 18 [2021-03-10 21:16:26,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697229168] [2021-03-10 21:16:26,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:16:26,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:26,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:16:26,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:26,159 INFO L87 Difference]: Start difference. First operand 26140 states and 66562 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:26,665 INFO L93 Difference]: Finished difference Result 29796 states and 73799 transitions. [2021-03-10 21:16:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:26,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:26,701 INFO L225 Difference]: With dead ends: 29796 [2021-03-10 21:16:26,701 INFO L226 Difference]: Without dead ends: 29754 [2021-03-10 21:16:26,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:16:26,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29754 states. [2021-03-10 21:16:26,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29754 to 25815. [2021-03-10 21:16:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25815 states, 25814 states have (on average 2.5435810025567522) internal successors, (65660), 25814 states have internal predecessors, (65660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25815 states to 25815 states and 65660 transitions. [2021-03-10 21:16:27,057 INFO L78 Accepts]: Start accepts. Automaton has 25815 states and 65660 transitions. Word has length 59 [2021-03-10 21:16:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:27,057 INFO L480 AbstractCegarLoop]: Abstraction has 25815 states and 65660 transitions. [2021-03-10 21:16:27,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 25815 states and 65660 transitions. [2021-03-10 21:16:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:27,071 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:27,071 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:27,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:27,271 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:27,271 INFO L82 PathProgramCache]: Analyzing trace with hash -147641869, now seen corresponding path program 270 times [2021-03-10 21:16:27,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:27,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117981867] [2021-03-10 21:16:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:27,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117981867] [2021-03-10 21:16:27,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842909891] [2021-03-10 21:16:27,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:27,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-03-10 21:16:27,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:27,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:27,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:27,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:16:27,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632689413] [2021-03-10 21:16:27,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:27,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:27,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:27,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:27,582 INFO L87 Difference]: Start difference. First operand 25815 states and 65660 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:28,682 INFO L93 Difference]: Finished difference Result 32813 states and 80310 transitions. [2021-03-10 21:16:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:16:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:28,718 INFO L225 Difference]: With dead ends: 32813 [2021-03-10 21:16:28,718 INFO L226 Difference]: Without dead ends: 32435 [2021-03-10 21:16:28,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:16:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32435 states. [2021-03-10 21:16:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32435 to 24759. [2021-03-10 21:16:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24759 states, 24758 states have (on average 2.533807254220858) internal successors, (62732), 24758 states have internal predecessors, (62732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24759 states to 24759 states and 62732 transitions. [2021-03-10 21:16:29,127 INFO L78 Accepts]: Start accepts. Automaton has 24759 states and 62732 transitions. Word has length 59 [2021-03-10 21:16:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:29,127 INFO L480 AbstractCegarLoop]: Abstraction has 24759 states and 62732 transitions. [2021-03-10 21:16:29,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 24759 states and 62732 transitions. [2021-03-10 21:16:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:29,141 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:29,141 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:29,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:29,342 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash -385703386, now seen corresponding path program 142 times [2021-03-10 21:16:29,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:29,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202797803] [2021-03-10 21:16:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:29,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202797803] [2021-03-10 21:16:29,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530712340] [2021-03-10 21:16:29,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:29,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:29,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:29,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:29,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:29,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:29,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:16:29,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052419447] [2021-03-10 21:16:29,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:16:29,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:29,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:16:29,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:29,579 INFO L87 Difference]: Start difference. First operand 24759 states and 62732 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:29,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:29,890 INFO L93 Difference]: Finished difference Result 29085 states and 71387 transitions. [2021-03-10 21:16:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:16:29,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:29,926 INFO L225 Difference]: With dead ends: 29085 [2021-03-10 21:16:29,926 INFO L226 Difference]: Without dead ends: 29071 [2021-03-10 21:16:29,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:29,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29071 states. [2021-03-10 21:16:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29071 to 25194. [2021-03-10 21:16:30,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25194 states, 25193 states have (on average 2.537133330687096) internal successors, (63918), 25193 states have internal predecessors, (63918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25194 states to 25194 states and 63918 transitions. [2021-03-10 21:16:30,274 INFO L78 Accepts]: Start accepts. Automaton has 25194 states and 63918 transitions. Word has length 59 [2021-03-10 21:16:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:30,274 INFO L480 AbstractCegarLoop]: Abstraction has 25194 states and 63918 transitions. [2021-03-10 21:16:30,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 25194 states and 63918 transitions. [2021-03-10 21:16:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:30,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:30,288 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:30,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-03-10 21:16:30,489 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1007583796, now seen corresponding path program 143 times [2021-03-10 21:16:30,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:30,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143221804] [2021-03-10 21:16:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:30,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143221804] [2021-03-10 21:16:30,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041244244] [2021-03-10 21:16:30,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:30,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-03-10 21:16:30,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:30,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:30,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:30,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:30,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-03-10 21:16:30,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879676547] [2021-03-10 21:16:30,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:16:30,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:30,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:16:30,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:30,759 INFO L87 Difference]: Start difference. First operand 25194 states and 63918 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:31,174 INFO L93 Difference]: Finished difference Result 36968 states and 90038 transitions. [2021-03-10 21:16:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:31,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:31,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:31,216 INFO L225 Difference]: With dead ends: 36968 [2021-03-10 21:16:31,217 INFO L226 Difference]: Without dead ends: 36968 [2021-03-10 21:16:31,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36968 states. [2021-03-10 21:16:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36968 to 25204. [2021-03-10 21:16:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25204 states, 25203 states have (on average 2.5373169860730864) internal successors, (63948), 25203 states have internal predecessors, (63948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25204 states to 25204 states and 63948 transitions. [2021-03-10 21:16:31,623 INFO L78 Accepts]: Start accepts. Automaton has 25204 states and 63948 transitions. Word has length 59 [2021-03-10 21:16:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:31,623 INFO L480 AbstractCegarLoop]: Abstraction has 25204 states and 63948 transitions. [2021-03-10 21:16:31,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 25204 states and 63948 transitions. [2021-03-10 21:16:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:31,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:31,637 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:31,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable956 [2021-03-10 21:16:31,838 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:31,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1649811044, now seen corresponding path program 144 times [2021-03-10 21:16:31,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:31,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464022129] [2021-03-10 21:16:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:31,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464022129] [2021-03-10 21:16:31,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097807706] [2021-03-10 21:16:31,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:31,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-03-10 21:16:31,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:31,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:31,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:32,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:32,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:16:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456055956] [2021-03-10 21:16:32,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:16:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:32,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:16:32,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:32,129 INFO L87 Difference]: Start difference. First operand 25204 states and 63948 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:32,615 INFO L93 Difference]: Finished difference Result 40151 states and 97682 transitions. [2021-03-10 21:16:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:16:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:32,661 INFO L225 Difference]: With dead ends: 40151 [2021-03-10 21:16:32,661 INFO L226 Difference]: Without dead ends: 40151 [2021-03-10 21:16:32,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=203, Invalid=303, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40151 states. [2021-03-10 21:16:33,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40151 to 25240. [2021-03-10 21:16:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25240 states, 25239 states have (on average 2.538254288997187) internal successors, (64063), 25239 states have internal predecessors, (64063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25240 states to 25240 states and 64063 transitions. [2021-03-10 21:16:33,104 INFO L78 Accepts]: Start accepts. Automaton has 25240 states and 64063 transitions. Word has length 59 [2021-03-10 21:16:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:33,105 INFO L480 AbstractCegarLoop]: Abstraction has 25240 states and 64063 transitions. [2021-03-10 21:16:33,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 25240 states and 64063 transitions. [2021-03-10 21:16:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:33,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:33,119 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:33,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable957,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:33,319 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash -40184120, now seen corresponding path program 145 times [2021-03-10 21:16:33,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:33,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970600320] [2021-03-10 21:16:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 126 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:33,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970600320] [2021-03-10 21:16:33,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212228166] [2021-03-10 21:16:33,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:33,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 127 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:33,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:33,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-03-10 21:16:33,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387518388] [2021-03-10 21:16:33,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:16:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:16:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:33,593 INFO L87 Difference]: Start difference. First operand 25240 states and 64063 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:34,118 INFO L93 Difference]: Finished difference Result 39779 states and 96847 transitions. [2021-03-10 21:16:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:16:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:34,163 INFO L225 Difference]: With dead ends: 39779 [2021-03-10 21:16:34,163 INFO L226 Difference]: Without dead ends: 39779 [2021-03-10 21:16:34,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=254, Invalid=396, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:16:34,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39779 states. [2021-03-10 21:16:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39779 to 25271. [2021-03-10 21:16:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25271 states, 25270 states have (on average 2.5388603086664028) internal successors, (64157), 25270 states have internal predecessors, (64157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:34,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25271 states to 25271 states and 64157 transitions. [2021-03-10 21:16:34,568 INFO L78 Accepts]: Start accepts. Automaton has 25271 states and 64157 transitions. Word has length 59 [2021-03-10 21:16:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:34,568 INFO L480 AbstractCegarLoop]: Abstraction has 25271 states and 64157 transitions. [2021-03-10 21:16:34,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 25271 states and 64157 transitions. [2021-03-10 21:16:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:34,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:34,583 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:34,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-03-10 21:16:34,783 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:34,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:34,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1079471132, now seen corresponding path program 146 times [2021-03-10 21:16:34,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:34,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895760415] [2021-03-10 21:16:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:34,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895760415] [2021-03-10 21:16:34,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572828512] [2021-03-10 21:16:34,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:34,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:34,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:34,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:34,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:35,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:35,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-03-10 21:16:35,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974148428] [2021-03-10 21:16:35,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:35,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:35,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:35,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:35,077 INFO L87 Difference]: Start difference. First operand 25271 states and 64157 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:35,640 INFO L93 Difference]: Finished difference Result 35877 states and 87560 transitions. [2021-03-10 21:16:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:16:35,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:35,680 INFO L225 Difference]: With dead ends: 35877 [2021-03-10 21:16:35,680 INFO L226 Difference]: Without dead ends: 35877 [2021-03-10 21:16:35,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:16:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35877 states. [2021-03-10 21:16:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35877 to 25299. [2021-03-10 21:16:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25299 states, 25298 states have (on average 2.539252114791683) internal successors, (64238), 25298 states have internal predecessors, (64238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25299 states to 25299 states and 64238 transitions. [2021-03-10 21:16:36,074 INFO L78 Accepts]: Start accepts. Automaton has 25299 states and 64238 transitions. Word has length 59 [2021-03-10 21:16:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:36,074 INFO L480 AbstractCegarLoop]: Abstraction has 25299 states and 64238 transitions. [2021-03-10 21:16:36,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 25299 states and 64238 transitions. [2021-03-10 21:16:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:36,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:36,088 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:36,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:36,289 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:36,289 INFO L82 PathProgramCache]: Analyzing trace with hash -59608760, now seen corresponding path program 147 times [2021-03-10 21:16:36,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:36,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040713405] [2021-03-10 21:16:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:36,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040713405] [2021-03-10 21:16:36,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667536161] [2021-03-10 21:16:36,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:36,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-03-10 21:16:36,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:36,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:36,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 107 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:36,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:36,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-03-10 21:16:36,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607960301] [2021-03-10 21:16:36,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:16:36,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:36,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:16:36,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:16:36,604 INFO L87 Difference]: Start difference. First operand 25299 states and 64238 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:37,171 INFO L93 Difference]: Finished difference Result 30625 states and 75232 transitions. [2021-03-10 21:16:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:16:37,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:37,208 INFO L225 Difference]: With dead ends: 30625 [2021-03-10 21:16:37,208 INFO L226 Difference]: Without dead ends: 30625 [2021-03-10 21:16:37,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:16:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30625 states. [2021-03-10 21:16:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30625 to 24655. [2021-03-10 21:16:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24655 states, 24654 states have (on average 2.53281414780563) internal successors, (62444), 24654 states have internal predecessors, (62444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24655 states to 24655 states and 62444 transitions. [2021-03-10 21:16:37,560 INFO L78 Accepts]: Start accepts. Automaton has 24655 states and 62444 transitions. Word has length 59 [2021-03-10 21:16:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:37,560 INFO L480 AbstractCegarLoop]: Abstraction has 24655 states and 62444 transitions. [2021-03-10 21:16:37,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 24655 states and 62444 transitions. [2021-03-10 21:16:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:37,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:37,574 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:37,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-03-10 21:16:37,774 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash 601775784, now seen corresponding path program 271 times [2021-03-10 21:16:37,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:37,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279065848] [2021-03-10 21:16:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:37,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279065848] [2021-03-10 21:16:37,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063930881] [2021-03-10 21:16:37,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:37,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:37,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:38,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:38,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 21:16:38,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37215357] [2021-03-10 21:16:38,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:38,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:38,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:38,068 INFO L87 Difference]: Start difference. First operand 24655 states and 62444 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:38,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:38,448 INFO L93 Difference]: Finished difference Result 27590 states and 68291 transitions. [2021-03-10 21:16:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:16:38,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:38,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:38,476 INFO L225 Difference]: With dead ends: 27590 [2021-03-10 21:16:38,476 INFO L226 Difference]: Without dead ends: 27545 [2021-03-10 21:16:38,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27545 states. [2021-03-10 21:16:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27545 to 24655. [2021-03-10 21:16:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24655 states, 24654 states have (on average 2.5324490954814634) internal successors, (62435), 24654 states have internal predecessors, (62435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24655 states to 24655 states and 62435 transitions. [2021-03-10 21:16:38,793 INFO L78 Accepts]: Start accepts. Automaton has 24655 states and 62435 transitions. Word has length 59 [2021-03-10 21:16:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:38,793 INFO L480 AbstractCegarLoop]: Abstraction has 24655 states and 62435 transitions. [2021-03-10 21:16:38,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 24655 states and 62435 transitions. [2021-03-10 21:16:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:38,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:38,807 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:39,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable961,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:39,007 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:39,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:39,007 INFO L82 PathProgramCache]: Analyzing trace with hash 972677468, now seen corresponding path program 272 times [2021-03-10 21:16:39,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:39,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775749995] [2021-03-10 21:16:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:39,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775749995] [2021-03-10 21:16:39,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364934769] [2021-03-10 21:16:39,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:39,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:39,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:39,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:39,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:39,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:16:39,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144913922] [2021-03-10 21:16:39,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:39,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:39,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:39,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:39,237 INFO L87 Difference]: Start difference. First operand 24655 states and 62435 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:39,464 INFO L93 Difference]: Finished difference Result 28234 states and 69527 transitions. [2021-03-10 21:16:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:16:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:39,496 INFO L225 Difference]: With dead ends: 28234 [2021-03-10 21:16:39,496 INFO L226 Difference]: Without dead ends: 28231 [2021-03-10 21:16:39,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28231 states. [2021-03-10 21:16:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28231 to 24643. [2021-03-10 21:16:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24643 states, 24642 states have (on average 2.531775018261505) internal successors, (62388), 24642 states have internal predecessors, (62388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24643 states to 24643 states and 62388 transitions. [2021-03-10 21:16:39,822 INFO L78 Accepts]: Start accepts. Automaton has 24643 states and 62388 transitions. Word has length 59 [2021-03-10 21:16:39,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:39,822 INFO L480 AbstractCegarLoop]: Abstraction has 24643 states and 62388 transitions. [2021-03-10 21:16:39,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 24643 states and 62388 transitions. [2021-03-10 21:16:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:39,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:39,835 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:40,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable968,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:40,036 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:40,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1179740034, now seen corresponding path program 273 times [2021-03-10 21:16:40,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:40,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318884737] [2021-03-10 21:16:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:40,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318884737] [2021-03-10 21:16:40,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827687935] [2021-03-10 21:16:40,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:40,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-03-10 21:16:40,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:40,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:40,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:40,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:40,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:16:40,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759379929] [2021-03-10 21:16:40,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:40,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:40,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:40,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:40,287 INFO L87 Difference]: Start difference. First operand 24643 states and 62388 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:40,596 INFO L93 Difference]: Finished difference Result 28258 states and 69529 transitions. [2021-03-10 21:16:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:16:40,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:40,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:40,629 INFO L225 Difference]: With dead ends: 28258 [2021-03-10 21:16:40,629 INFO L226 Difference]: Without dead ends: 28240 [2021-03-10 21:16:40,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28240 states. [2021-03-10 21:16:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28240 to 24649. [2021-03-10 21:16:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24649 states, 24648 states have (on average 2.530915287244401) internal successors, (62382), 24648 states have internal predecessors, (62382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24649 states to 24649 states and 62382 transitions. [2021-03-10 21:16:41,001 INFO L78 Accepts]: Start accepts. Automaton has 24649 states and 62382 transitions. Word has length 59 [2021-03-10 21:16:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:41,001 INFO L480 AbstractCegarLoop]: Abstraction has 24649 states and 62382 transitions. [2021-03-10 21:16:41,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 24649 states and 62382 transitions. [2021-03-10 21:16:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:41,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:41,015 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:41,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:41,215 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:41,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:41,215 INFO L82 PathProgramCache]: Analyzing trace with hash -268259979, now seen corresponding path program 274 times [2021-03-10 21:16:41,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:41,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554409085] [2021-03-10 21:16:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:41,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554409085] [2021-03-10 21:16:41,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304890776] [2021-03-10 21:16:41,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:41,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:41,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:41,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:41,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:41,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:41,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:16:41,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218239835] [2021-03-10 21:16:41,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:41,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:41,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:41,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:41,499 INFO L87 Difference]: Start difference. First operand 24649 states and 62382 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:42,555 INFO L93 Difference]: Finished difference Result 26419 states and 65758 transitions. [2021-03-10 21:16:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:42,585 INFO L225 Difference]: With dead ends: 26419 [2021-03-10 21:16:42,585 INFO L226 Difference]: Without dead ends: 26130 [2021-03-10 21:16:42,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26130 states. [2021-03-10 21:16:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26130 to 24687. [2021-03-10 21:16:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24687 states, 24686 states have (on average 2.525561046747144) internal successors, (62346), 24686 states have internal predecessors, (62346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24687 states to 24687 states and 62346 transitions. [2021-03-10 21:16:42,898 INFO L78 Accepts]: Start accepts. Automaton has 24687 states and 62346 transitions. Word has length 59 [2021-03-10 21:16:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:42,898 INFO L480 AbstractCegarLoop]: Abstraction has 24687 states and 62346 transitions. [2021-03-10 21:16:42,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 24687 states and 62346 transitions. [2021-03-10 21:16:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:42,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:42,912 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:43,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable973,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:43,112 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:43,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:43,112 INFO L82 PathProgramCache]: Analyzing trace with hash -881796159, now seen corresponding path program 275 times [2021-03-10 21:16:43,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:43,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097801822] [2021-03-10 21:16:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:43,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097801822] [2021-03-10 21:16:43,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728266064] [2021-03-10 21:16:43,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:43,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-03-10 21:16:43,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:16:43,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:43,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:16:43,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110468916] [2021-03-10 21:16:43,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:43,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:43,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:43,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:43,437 INFO L87 Difference]: Start difference. First operand 24687 states and 62346 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:44,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:44,190 INFO L93 Difference]: Finished difference Result 26613 states and 66276 transitions. [2021-03-10 21:16:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:44,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:44,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:44,221 INFO L225 Difference]: With dead ends: 26613 [2021-03-10 21:16:44,221 INFO L226 Difference]: Without dead ends: 26547 [2021-03-10 21:16:44,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26547 states. [2021-03-10 21:16:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26547 to 24779. [2021-03-10 21:16:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24779 states, 24778 states have (on average 2.5258697231414966) internal successors, (62586), 24778 states have internal predecessors, (62586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:44,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24779 states to 24779 states and 62586 transitions. [2021-03-10 21:16:44,537 INFO L78 Accepts]: Start accepts. Automaton has 24779 states and 62586 transitions. Word has length 59 [2021-03-10 21:16:44,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:44,537 INFO L480 AbstractCegarLoop]: Abstraction has 24779 states and 62586 transitions. [2021-03-10 21:16:44,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:44,537 INFO L276 IsEmpty]: Start isEmpty. Operand 24779 states and 62586 transitions. [2021-03-10 21:16:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:44,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:44,551 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:44,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable974 [2021-03-10 21:16:44,751 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1039095646, now seen corresponding path program 148 times [2021-03-10 21:16:44,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:44,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390408902] [2021-03-10 21:16:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:44,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390408902] [2021-03-10 21:16:44,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128571558] [2021-03-10 21:16:44,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:44,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:44,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:44,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:44,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:16:44,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541779317] [2021-03-10 21:16:44,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:16:44,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:44,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:16:44,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:44,997 INFO L87 Difference]: Start difference. First operand 24779 states and 62586 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:45,326 INFO L93 Difference]: Finished difference Result 28587 states and 70241 transitions. [2021-03-10 21:16:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:16:45,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:45,426 INFO L225 Difference]: With dead ends: 28587 [2021-03-10 21:16:45,426 INFO L226 Difference]: Without dead ends: 28557 [2021-03-10 21:16:45,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28557 states. [2021-03-10 21:16:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28557 to 25280. [2021-03-10 21:16:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25280 states, 25279 states have (on average 2.5293326476522013) internal successors, (63939), 25279 states have internal predecessors, (63939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25280 states to 25280 states and 63939 transitions. [2021-03-10 21:16:45,723 INFO L78 Accepts]: Start accepts. Automaton has 25280 states and 63939 transitions. Word has length 59 [2021-03-10 21:16:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:45,723 INFO L480 AbstractCegarLoop]: Abstraction has 25280 states and 63939 transitions. [2021-03-10 21:16:45,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 25280 states and 63939 transitions. [2021-03-10 21:16:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:45,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:45,737 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:45,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:45,937 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1260121175, now seen corresponding path program 276 times [2021-03-10 21:16:45,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:45,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938742503] [2021-03-10 21:16:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:46,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938742503] [2021-03-10 21:16:46,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023234728] [2021-03-10 21:16:46,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:46,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-03-10 21:16:46,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:46,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:46,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:16:46,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996269364] [2021-03-10 21:16:46,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:16:46,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:46,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:16:46,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:46,228 INFO L87 Difference]: Start difference. First operand 25280 states and 63939 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:47,400 INFO L93 Difference]: Finished difference Result 29430 states and 72911 transitions. [2021-03-10 21:16:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:16:47,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:47,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:47,433 INFO L225 Difference]: With dead ends: 29430 [2021-03-10 21:16:47,433 INFO L226 Difference]: Without dead ends: 29376 [2021-03-10 21:16:47,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:16:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29376 states. [2021-03-10 21:16:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29376 to 25735. [2021-03-10 21:16:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25735 states, 25734 states have (on average 2.533263386958887) internal successors, (65191), 25734 states have internal predecessors, (65191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25735 states to 25735 states and 65191 transitions. [2021-03-10 21:16:47,781 INFO L78 Accepts]: Start accepts. Automaton has 25735 states and 65191 transitions. Word has length 59 [2021-03-10 21:16:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:47,781 INFO L480 AbstractCegarLoop]: Abstraction has 25735 states and 65191 transitions. [2021-03-10 21:16:47,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 25735 states and 65191 transitions. [2021-03-10 21:16:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:47,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:47,795 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:47,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable978,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:47,996 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:47,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1502287012, now seen corresponding path program 277 times [2021-03-10 21:16:47,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:47,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774175287] [2021-03-10 21:16:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:48,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774175287] [2021-03-10 21:16:48,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681841597] [2021-03-10 21:16:48,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:48,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:48,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:48,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:48,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:16:48,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995230725] [2021-03-10 21:16:48,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:16:48,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:48,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:16:48,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:48,255 INFO L87 Difference]: Start difference. First operand 25735 states and 65191 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:48,560 INFO L93 Difference]: Finished difference Result 29318 states and 72299 transitions. [2021-03-10 21:16:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:16:48,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:48,593 INFO L225 Difference]: With dead ends: 29318 [2021-03-10 21:16:48,593 INFO L226 Difference]: Without dead ends: 29294 [2021-03-10 21:16:48,593 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29294 states. [2021-03-10 21:16:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29294 to 25735. [2021-03-10 21:16:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25735 states, 25734 states have (on average 2.53252506411751) internal successors, (65172), 25734 states have internal predecessors, (65172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25735 states to 25735 states and 65172 transitions. [2021-03-10 21:16:48,943 INFO L78 Accepts]: Start accepts. Automaton has 25735 states and 65172 transitions. Word has length 59 [2021-03-10 21:16:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:48,943 INFO L480 AbstractCegarLoop]: Abstraction has 25735 states and 65172 transitions. [2021-03-10 21:16:48,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 25735 states and 65172 transitions. [2021-03-10 21:16:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:48,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:48,957 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:49,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable979 [2021-03-10 21:16:49,157 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:49,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1414957709, now seen corresponding path program 278 times [2021-03-10 21:16:49,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:49,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944451171] [2021-03-10 21:16:49,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:49,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944451171] [2021-03-10 21:16:49,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972529729] [2021-03-10 21:16:49,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:49,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:49,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:49,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:16:49,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308104688] [2021-03-10 21:16:49,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:16:49,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:49,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:16:49,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:49,454 INFO L87 Difference]: Start difference. First operand 25735 states and 65172 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:51,065 INFO L93 Difference]: Finished difference Result 34728 states and 85132 transitions. [2021-03-10 21:16:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:16:51,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:51,104 INFO L225 Difference]: With dead ends: 34728 [2021-03-10 21:16:51,104 INFO L226 Difference]: Without dead ends: 34560 [2021-03-10 21:16:51,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 626.6ms TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:16:51,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34560 states. [2021-03-10 21:16:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34560 to 26600. [2021-03-10 21:16:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26600 states, 26599 states have (on average 2.538065340802286) internal successors, (67510), 26599 states have internal predecessors, (67510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26600 states to 26600 states and 67510 transitions. [2021-03-10 21:16:51,492 INFO L78 Accepts]: Start accepts. Automaton has 26600 states and 67510 transitions. Word has length 59 [2021-03-10 21:16:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:51,492 INFO L480 AbstractCegarLoop]: Abstraction has 26600 states and 67510 transitions. [2021-03-10 21:16:51,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 26600 states and 67510 transitions. [2021-03-10 21:16:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:51,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:51,506 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:51,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable983,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:51,706 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:51,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1801560386, now seen corresponding path program 279 times [2021-03-10 21:16:51,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:51,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412981105] [2021-03-10 21:16:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:51,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412981105] [2021-03-10 21:16:51,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474057778] [2021-03-10 21:16:51,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:51,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-03-10 21:16:51,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:51,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:51,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:51,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:51,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:16:51,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564764117] [2021-03-10 21:16:51,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:16:51,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:51,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:16:51,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:51,983 INFO L87 Difference]: Start difference. First operand 26600 states and 67510 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:52,368 INFO L93 Difference]: Finished difference Result 30353 states and 74938 transitions. [2021-03-10 21:16:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:16:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:52,405 INFO L225 Difference]: With dead ends: 30353 [2021-03-10 21:16:52,405 INFO L226 Difference]: Without dead ends: 30320 [2021-03-10 21:16:52,405 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:16:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30320 states. [2021-03-10 21:16:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30320 to 26600. [2021-03-10 21:16:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26600 states, 26599 states have (on average 2.537501409827437) internal successors, (67495), 26599 states have internal predecessors, (67495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26600 states to 26600 states and 67495 transitions. [2021-03-10 21:16:52,768 INFO L78 Accepts]: Start accepts. Automaton has 26600 states and 67495 transitions. Word has length 59 [2021-03-10 21:16:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:52,769 INFO L480 AbstractCegarLoop]: Abstraction has 26600 states and 67495 transitions. [2021-03-10 21:16:52,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,769 INFO L276 IsEmpty]: Start isEmpty. Operand 26600 states and 67495 transitions. [2021-03-10 21:16:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:52,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:52,783 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:52,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-03-10 21:16:52,983 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:52,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:52,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1355266199, now seen corresponding path program 280 times [2021-03-10 21:16:52,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:52,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580990368] [2021-03-10 21:16:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:53,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580990368] [2021-03-10 21:16:53,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942734870] [2021-03-10 21:16:53,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:53,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:53,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:53,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:53,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:53,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:53,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:16:53,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943683836] [2021-03-10 21:16:53,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:16:53,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:16:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:53,286 INFO L87 Difference]: Start difference. First operand 26600 states and 67495 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:55,627 INFO L93 Difference]: Finished difference Result 46139 states and 111536 transitions. [2021-03-10 21:16:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 21:16:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:55,676 INFO L225 Difference]: With dead ends: 46139 [2021-03-10 21:16:55,676 INFO L226 Difference]: Without dead ends: 45617 [2021-03-10 21:16:55,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 1169.7ms TimeCoverageRelationStatistics Valid=657, Invalid=6149, Unknown=0, NotChecked=0, Total=6806 [2021-03-10 21:16:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45617 states. [2021-03-10 21:16:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45617 to 27973. [2021-03-10 21:16:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27973 states, 27972 states have (on average 2.5446875446875445) internal successors, (71180), 27972 states have internal predecessors, (71180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27973 states to 27973 states and 71180 transitions. [2021-03-10 21:16:56,145 INFO L78 Accepts]: Start accepts. Automaton has 27973 states and 71180 transitions. Word has length 59 [2021-03-10 21:16:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:56,145 INFO L480 AbstractCegarLoop]: Abstraction has 27973 states and 71180 transitions. [2021-03-10 21:16:56,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 27973 states and 71180 transitions. [2021-03-10 21:16:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:56,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:56,160 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:56,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable989,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:56,360 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:56,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1046128228, now seen corresponding path program 281 times [2021-03-10 21:16:56,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:56,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972909647] [2021-03-10 21:16:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:56,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972909647] [2021-03-10 21:16:56,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837285045] [2021-03-10 21:16:56,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:56,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:16:56,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:56,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:16:56,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:56,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:56,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-03-10 21:16:56,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071017524] [2021-03-10 21:16:56,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:16:56,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:56,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:16:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:16:56,678 INFO L87 Difference]: Start difference. First operand 27973 states and 71180 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:57,087 INFO L93 Difference]: Finished difference Result 32121 states and 79394 transitions. [2021-03-10 21:16:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:16:57,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:16:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:57,123 INFO L225 Difference]: With dead ends: 32121 [2021-03-10 21:16:57,123 INFO L226 Difference]: Without dead ends: 32079 [2021-03-10 21:16:57,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32079 states. [2021-03-10 21:16:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32079 to 27973. [2021-03-10 21:16:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27973 states, 27972 states have (on average 2.5441512941512943) internal successors, (71165), 27972 states have internal predecessors, (71165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27973 states to 27973 states and 71165 transitions. [2021-03-10 21:16:57,510 INFO L78 Accepts]: Start accepts. Automaton has 27973 states and 71165 transitions. Word has length 59 [2021-03-10 21:16:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:57,510 INFO L480 AbstractCegarLoop]: Abstraction has 27973 states and 71165 transitions. [2021-03-10 21:16:57,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 27973 states and 71165 transitions. [2021-03-10 21:16:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:16:57,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:57,525 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:57,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable990 [2021-03-10 21:16:57,725 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:57,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:57,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1201952333, now seen corresponding path program 282 times [2021-03-10 21:16:57,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:57,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194395011] [2021-03-10 21:16:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:57,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194395011] [2021-03-10 21:16:57,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37977453] [2021-03-10 21:16:57,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:57,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-03-10 21:16:57,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:57,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:16:57,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:58,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:58,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:16:58,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754205835] [2021-03-10 21:16:58,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:58,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:58,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:58,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:58,049 INFO L87 Difference]: Start difference. First operand 27973 states and 71165 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:01,404 INFO L93 Difference]: Finished difference Result 56223 states and 135710 transitions. [2021-03-10 21:17:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-03-10 21:17:01,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:01,476 INFO L225 Difference]: With dead ends: 56223 [2021-03-10 21:17:01,477 INFO L226 Difference]: Without dead ends: 55605 [2021-03-10 21:17:01,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6679 ImplicationChecksByTransitivity, 2178.0ms TimeCoverageRelationStatistics Valid=1467, Invalid=15563, Unknown=0, NotChecked=0, Total=17030 [2021-03-10 21:17:01,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55605 states. [2021-03-10 21:17:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55605 to 29239. [2021-03-10 21:17:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29239 states, 29238 states have (on average 2.5499008140091663) internal successors, (74554), 29238 states have internal predecessors, (74554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29239 states to 29239 states and 74554 transitions. [2021-03-10 21:17:02,026 INFO L78 Accepts]: Start accepts. Automaton has 29239 states and 74554 transitions. Word has length 59 [2021-03-10 21:17:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:02,026 INFO L480 AbstractCegarLoop]: Abstraction has 29239 states and 74554 transitions. [2021-03-10 21:17:02,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 29239 states and 74554 transitions. [2021-03-10 21:17:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:02,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:02,041 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:02,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable996,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:02,252 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:02,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1951369986, now seen corresponding path program 283 times [2021-03-10 21:17:02,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:02,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901129699] [2021-03-10 21:17:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:02,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901129699] [2021-03-10 21:17:02,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029208161] [2021-03-10 21:17:02,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:02,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:02,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:02,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 21:17:02,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954008924] [2021-03-10 21:17:02,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:02,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:02,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:02,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:02,564 INFO L87 Difference]: Start difference. First operand 29239 states and 74554 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:03,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:03,016 INFO L93 Difference]: Finished difference Result 33382 states and 82731 transitions. [2021-03-10 21:17:03,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:17:03,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:03,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:03,053 INFO L225 Difference]: With dead ends: 33382 [2021-03-10 21:17:03,053 INFO L226 Difference]: Without dead ends: 33331 [2021-03-10 21:17:03,053 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:17:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33331 states. [2021-03-10 21:17:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33331 to 28908. [2021-03-10 21:17:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28908 states, 28907 states have (on average 2.547652817656623) internal successors, (73645), 28907 states have internal predecessors, (73645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28908 states to 28908 states and 73645 transitions. [2021-03-10 21:17:03,446 INFO L78 Accepts]: Start accepts. Automaton has 28908 states and 73645 transitions. Word has length 59 [2021-03-10 21:17:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:03,447 INFO L480 AbstractCegarLoop]: Abstraction has 28908 states and 73645 transitions. [2021-03-10 21:17:03,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 28908 states and 73645 transitions. [2021-03-10 21:17:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:03,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:03,461 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:03,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-03-10 21:17:03,662 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:03,662 INFO L82 PathProgramCache]: Analyzing trace with hash -621194025, now seen corresponding path program 284 times [2021-03-10 21:17:03,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:03,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477732724] [2021-03-10 21:17:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:03,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477732724] [2021-03-10 21:17:03,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850126869] [2021-03-10 21:17:03,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:03,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:03,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:17:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:04,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:04,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:17:04,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773936638] [2021-03-10 21:17:04,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:17:04,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:04,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:17:04,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:17:04,001 INFO L87 Difference]: Start difference. First operand 28908 states and 73645 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:05,311 INFO L93 Difference]: Finished difference Result 37977 states and 91946 transitions. [2021-03-10 21:17:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:17:05,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:05,354 INFO L225 Difference]: With dead ends: 37977 [2021-03-10 21:17:05,354 INFO L226 Difference]: Without dead ends: 37137 [2021-03-10 21:17:05,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 480.9ms TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:17:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37137 states. [2021-03-10 21:17:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37137 to 24839. [2021-03-10 21:17:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24839 states, 24838 states have (on average 2.519204444802319) internal successors, (62572), 24838 states have internal predecessors, (62572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24839 states to 24839 states and 62572 transitions. [2021-03-10 21:17:05,733 INFO L78 Accepts]: Start accepts. Automaton has 24839 states and 62572 transitions. Word has length 59 [2021-03-10 21:17:05,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:05,733 INFO L480 AbstractCegarLoop]: Abstraction has 24839 states and 62572 transitions. [2021-03-10 21:17:05,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 24839 states and 62572 transitions. [2021-03-10 21:17:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:05,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:05,747 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:05,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1004,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:05,947 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:05,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:05,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1481135952, now seen corresponding path program 149 times [2021-03-10 21:17:05,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:05,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385222450] [2021-03-10 21:17:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:06,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385222450] [2021-03-10 21:17:06,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963858222] [2021-03-10 21:17:06,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:06,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-03-10 21:17:06,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:06,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:06,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:06,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:06,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-03-10 21:17:06,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643305618] [2021-03-10 21:17:06,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:06,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:06,232 INFO L87 Difference]: Start difference. First operand 24839 states and 62572 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:06,668 INFO L93 Difference]: Finished difference Result 35806 states and 87025 transitions. [2021-03-10 21:17:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:17:06,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:06,708 INFO L225 Difference]: With dead ends: 35806 [2021-03-10 21:17:06,709 INFO L226 Difference]: Without dead ends: 35806 [2021-03-10 21:17:06,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=180, Invalid=240, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:17:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35806 states. [2021-03-10 21:17:07,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35806 to 24980. [2021-03-10 21:17:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24980 states, 24979 states have (on average 2.5217182433243925) internal successors, (62990), 24979 states have internal predecessors, (62990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24980 states to 24980 states and 62990 transitions. [2021-03-10 21:17:07,070 INFO L78 Accepts]: Start accepts. Automaton has 24980 states and 62990 transitions. Word has length 59 [2021-03-10 21:17:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:07,071 INFO L480 AbstractCegarLoop]: Abstraction has 24980 states and 62990 transitions. [2021-03-10 21:17:07,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 24980 states and 62990 transitions. [2021-03-10 21:17:07,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:07,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:07,084 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:07,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1005 [2021-03-10 21:17:07,285 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:07,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:07,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1176258888, now seen corresponding path program 150 times [2021-03-10 21:17:07,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:07,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022376964] [2021-03-10 21:17:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:07,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022376964] [2021-03-10 21:17:07,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763729673] [2021-03-10 21:17:07,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:07,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-03-10 21:17:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:07,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:07,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:07,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:07,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:17:07,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545572422] [2021-03-10 21:17:07,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:17:07,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:07,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:17:07,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:17:07,566 INFO L87 Difference]: Start difference. First operand 24980 states and 62990 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:08,114 INFO L93 Difference]: Finished difference Result 39544 states and 95942 transitions. [2021-03-10 21:17:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:17:08,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:08,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:08,160 INFO L225 Difference]: With dead ends: 39544 [2021-03-10 21:17:08,160 INFO L226 Difference]: Without dead ends: 39544 [2021-03-10 21:17:08,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:17:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39544 states. [2021-03-10 21:17:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39544 to 25022. [2021-03-10 21:17:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25022 states, 25021 states have (on average 2.5225210822908757) internal successors, (63116), 25021 states have internal predecessors, (63116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25022 states to 25022 states and 63116 transitions. [2021-03-10 21:17:08,680 INFO L78 Accepts]: Start accepts. Automaton has 25022 states and 63116 transitions. Word has length 59 [2021-03-10 21:17:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:08,680 INFO L480 AbstractCegarLoop]: Abstraction has 25022 states and 63116 transitions. [2021-03-10 21:17:08,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 25022 states and 63116 transitions. [2021-03-10 21:17:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:08,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:08,692 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:08,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1006,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:08,892 INFO L428 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:08,893 INFO L82 PathProgramCache]: Analyzing trace with hash -513736276, now seen corresponding path program 151 times [2021-03-10 21:17:08,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:08,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922051475] [2021-03-10 21:17:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922051475] [2021-03-10 21:17:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861389238] [2021-03-10 21:17:09,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:09,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:09,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-03-10 21:17:09,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279011694] [2021-03-10 21:17:09,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:09,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:09,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:09,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:09,186 INFO L87 Difference]: Start difference. First operand 25022 states and 63116 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:09,884 INFO L93 Difference]: Finished difference Result 40570 states and 98446 transitions. [2021-03-10 21:17:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:17:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:09,931 INFO L225 Difference]: With dead ends: 40570 [2021-03-10 21:17:09,932 INFO L226 Difference]: Without dead ends: 40570 [2021-03-10 21:17:09,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:17:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40570 states. [2021-03-10 21:17:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40570 to 25073. [2021-03-10 21:17:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25073 states, 25072 states have (on average 2.523492342054882) internal successors, (63269), 25072 states have internal predecessors, (63269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25073 states to 25073 states and 63269 transitions. [2021-03-10 21:17:10,342 INFO L78 Accepts]: Start accepts. Automaton has 25073 states and 63269 transitions. Word has length 59 [2021-03-10 21:17:10,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:10,342 INFO L480 AbstractCegarLoop]: Abstraction has 25073 states and 63269 transitions. [2021-03-10 21:17:10,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 25073 states and 63269 transitions. [2021-03-10 21:17:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:10,356 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:10,356 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:10,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1007 [2021-03-10 21:17:10,556 INFO L428 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:10,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1553023288, now seen corresponding path program 152 times [2021-03-10 21:17:10,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:10,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869568653] [2021-03-10 21:17:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:10,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869568653] [2021-03-10 21:17:10,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665336703] [2021-03-10 21:17:10,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:10,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:10,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:10,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:10,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 122 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:10,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:10,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-03-10 21:17:10,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673330594] [2021-03-10 21:17:10,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:10,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:10,866 INFO L87 Difference]: Start difference. First operand 25073 states and 63269 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:11,621 INFO L93 Difference]: Finished difference Result 38992 states and 94758 transitions. [2021-03-10 21:17:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:17:11,622 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:11,667 INFO L225 Difference]: With dead ends: 38992 [2021-03-10 21:17:11,667 INFO L226 Difference]: Without dead ends: 38992 [2021-03-10 21:17:11,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=355, Invalid=575, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:17:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38992 states. [2021-03-10 21:17:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38992 to 25113. [2021-03-10 21:17:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25113 states, 25112 states have (on average 2.5243309971328447) internal successors, (63391), 25112 states have internal predecessors, (63391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25113 states to 25113 states and 63391 transitions. [2021-03-10 21:17:12,061 INFO L78 Accepts]: Start accepts. Automaton has 25113 states and 63391 transitions. Word has length 59 [2021-03-10 21:17:12,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:12,061 INFO L480 AbstractCegarLoop]: Abstraction has 25113 states and 63391 transitions. [2021-03-10 21:17:12,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 25113 states and 63391 transitions. [2021-03-10 21:17:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:12,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:12,076 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:12,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1008,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:12,276 INFO L428 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash -533160916, now seen corresponding path program 153 times [2021-03-10 21:17:12,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:12,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897799318] [2021-03-10 21:17:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:12,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897799318] [2021-03-10 21:17:12,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954588202] [2021-03-10 21:17:12,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:12,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-03-10 21:17:12,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:12,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:17:12,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:12,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:12,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-03-10 21:17:12,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466663650] [2021-03-10 21:17:12,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:17:12,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:17:12,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:17:12,706 INFO L87 Difference]: Start difference. First operand 25113 states and 63391 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:13,350 INFO L93 Difference]: Finished difference Result 28405 states and 69624 transitions. [2021-03-10 21:17:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:17:13,351 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:13,382 INFO L225 Difference]: With dead ends: 28405 [2021-03-10 21:17:13,383 INFO L226 Difference]: Without dead ends: 28405 [2021-03-10 21:17:13,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:17:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28405 states. [2021-03-10 21:17:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28405 to 24497. [2021-03-10 21:17:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24497 states, 24496 states have (on average 2.5198807968647943) internal successors, (61727), 24496 states have internal predecessors, (61727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24497 states to 24497 states and 61727 transitions. [2021-03-10 21:17:13,731 INFO L78 Accepts]: Start accepts. Automaton has 24497 states and 61727 transitions. Word has length 59 [2021-03-10 21:17:13,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:13,731 INFO L480 AbstractCegarLoop]: Abstraction has 24497 states and 61727 transitions. [2021-03-10 21:17:13,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:13,731 INFO L276 IsEmpty]: Start isEmpty. Operand 24497 states and 61727 transitions. [2021-03-10 21:17:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:13,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:13,745 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:13,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1009 [2021-03-10 21:17:13,946 INFO L428 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:13,946 INFO L82 PathProgramCache]: Analyzing trace with hash -539355172, now seen corresponding path program 285 times [2021-03-10 21:17:13,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:13,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197526312] [2021-03-10 21:17:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:14,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197526312] [2021-03-10 21:17:14,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495630825] [2021-03-10 21:17:14,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:14,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:17:14,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:14,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:14,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:14,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:14,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-03-10 21:17:14,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229882546] [2021-03-10 21:17:14,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:17:14,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:14,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:17:14,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:17:14,279 INFO L87 Difference]: Start difference. First operand 24497 states and 61727 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:14,788 INFO L93 Difference]: Finished difference Result 27673 states and 68086 transitions. [2021-03-10 21:17:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:17:14,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:14,817 INFO L225 Difference]: With dead ends: 27673 [2021-03-10 21:17:14,817 INFO L226 Difference]: Without dead ends: 27619 [2021-03-10 21:17:14,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27619 states. [2021-03-10 21:17:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27619 to 24497. [2021-03-10 21:17:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24497 states, 24496 states have (on average 2.519268451992162) internal successors, (61712), 24496 states have internal predecessors, (61712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24497 states to 24497 states and 61712 transitions. [2021-03-10 21:17:15,126 INFO L78 Accepts]: Start accepts. Automaton has 24497 states and 61712 transitions. Word has length 59 [2021-03-10 21:17:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:15,126 INFO L480 AbstractCegarLoop]: Abstraction has 24497 states and 61712 transitions. [2021-03-10 21:17:15,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 24497 states and 61712 transitions. [2021-03-10 21:17:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:15,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:15,139 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:15,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-03-10 21:17:15,340 INFO L428 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:15,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:15,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1196579045, now seen corresponding path program 154 times [2021-03-10 21:17:15,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:15,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880248958] [2021-03-10 21:17:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:15,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880248958] [2021-03-10 21:17:15,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675482953] [2021-03-10 21:17:15,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:15,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:15,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:15,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:17:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:15,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:15,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:17:15,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412503935] [2021-03-10 21:17:15,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:17:15,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:15,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:17:15,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:17:15,640 INFO L87 Difference]: Start difference. First operand 24497 states and 61712 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:16,460 INFO L93 Difference]: Finished difference Result 25955 states and 64681 transitions. [2021-03-10 21:17:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:17:16,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:16,489 INFO L225 Difference]: With dead ends: 25955 [2021-03-10 21:17:16,489 INFO L226 Difference]: Without dead ends: 25938 [2021-03-10 21:17:16,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:17:16,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25938 states. [2021-03-10 21:17:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25938 to 24664. [2021-03-10 21:17:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24664 states, 24663 states have (on average 2.5176580302477394) internal successors, (62093), 24663 states have internal predecessors, (62093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24664 states to 24664 states and 62093 transitions. [2021-03-10 21:17:16,807 INFO L78 Accepts]: Start accepts. Automaton has 24664 states and 62093 transitions. Word has length 59 [2021-03-10 21:17:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:16,808 INFO L480 AbstractCegarLoop]: Abstraction has 24664 states and 62093 transitions. [2021-03-10 21:17:16,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:16,808 INFO L276 IsEmpty]: Start isEmpty. Operand 24664 states and 62093 transitions. [2021-03-10 21:17:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:16,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:16,821 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:17,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1020,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:17,021 INFO L428 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1751753960, now seen corresponding path program 286 times [2021-03-10 21:17:17,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:17,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989209385] [2021-03-10 21:17:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:17:17,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989209385] [2021-03-10 21:17:17,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195926352] [2021-03-10 21:17:17,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:17,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:17,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:17,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:17,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:17:17,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:17,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:17:17,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969010840] [2021-03-10 21:17:17,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:17:17,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:17:17,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:17:17,303 INFO L87 Difference]: Start difference. First operand 24664 states and 62093 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:17,580 INFO L93 Difference]: Finished difference Result 28157 states and 69065 transitions. [2021-03-10 21:17:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:17:17,581 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:17,612 INFO L225 Difference]: With dead ends: 28157 [2021-03-10 21:17:17,612 INFO L226 Difference]: Without dead ends: 28139 [2021-03-10 21:17:17,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28139 states. [2021-03-10 21:17:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28139 to 24664. [2021-03-10 21:17:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24664 states, 24663 states have (on average 2.5169281920285447) internal successors, (62075), 24663 states have internal predecessors, (62075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24664 states to 24664 states and 62075 transitions. [2021-03-10 21:17:17,974 INFO L78 Accepts]: Start accepts. Automaton has 24664 states and 62075 transitions. Word has length 59 [2021-03-10 21:17:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:17,974 INFO L480 AbstractCegarLoop]: Abstraction has 24664 states and 62075 transitions. [2021-03-10 21:17:17,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 24664 states and 62075 transitions. [2021-03-10 21:17:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:17,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:17,988 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:18,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:18,188 INFO L428 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash 303753947, now seen corresponding path program 287 times [2021-03-10 21:17:18,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:18,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504674348] [2021-03-10 21:17:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:18,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504674348] [2021-03-10 21:17:18,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115742836] [2021-03-10 21:17:18,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:18,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-03-10 21:17:18,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:18,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:17:18,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:18,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:18,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:17:18,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862421696] [2021-03-10 21:17:18,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:17:18,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:18,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:17:18,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:17:18,489 INFO L87 Difference]: Start difference. First operand 24664 states and 62075 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:19,640 INFO L93 Difference]: Finished difference Result 25564 states and 63737 transitions. [2021-03-10 21:17:19,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:17:19,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:19,669 INFO L225 Difference]: With dead ends: 25564 [2021-03-10 21:17:19,669 INFO L226 Difference]: Without dead ends: 25434 [2021-03-10 21:17:19,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:17:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2021-03-10 21:17:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 24585. [2021-03-10 21:17:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24585 states, 24584 states have (on average 2.5149284087211194) internal successors, (61827), 24584 states have internal predecessors, (61827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24585 states to 24585 states and 61827 transitions. [2021-03-10 21:17:19,980 INFO L78 Accepts]: Start accepts. Automaton has 24585 states and 61827 transitions. Word has length 59 [2021-03-10 21:17:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:19,980 INFO L480 AbstractCegarLoop]: Abstraction has 24585 states and 61827 transitions. [2021-03-10 21:17:19,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 24585 states and 61827 transitions. [2021-03-10 21:17:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:19,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:19,994 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:20,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-03-10 21:17:20,194 INFO L428 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash -309782233, now seen corresponding path program 288 times [2021-03-10 21:17:20,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:20,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307415314] [2021-03-10 21:17:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:17:20,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307415314] [2021-03-10 21:17:20,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88463205] [2021-03-10 21:17:20,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:20,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-03-10 21:17:20,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:20,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 21:17:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:20,701 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-10 21:17:20,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-03-10 21:17:20,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:17:20,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:17:20,713 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:17:20,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:17:20,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-03-10 21:17:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 66 proven. 109 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:20,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:20,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-03-10 21:17:20,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501559069] [2021-03-10 21:17:20,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:17:20,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:20,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:17:20,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:20,755 INFO L87 Difference]: Start difference. First operand 24585 states and 61827 transitions. Second operand has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:24,149 INFO L93 Difference]: Finished difference Result 37850 states and 90778 transitions. [2021-03-10 21:17:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-03-10 21:17:24,150 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:24,184 INFO L225 Difference]: With dead ends: 37850 [2021-03-10 21:17:24,184 INFO L226 Difference]: Without dead ends: 37727 [2021-03-10 21:17:24,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3186 ImplicationChecksByTransitivity, 1863.6ms TimeCoverageRelationStatistics Valid=1354, Invalid=7958, Unknown=0, NotChecked=0, Total=9312 [2021-03-10 21:17:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37727 states. [2021-03-10 21:17:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37727 to 25378. [2021-03-10 21:17:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25378 states, 25377 states have (on average 2.5165701225519173) internal successors, (63863), 25377 states have internal predecessors, (63863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25378 states to 25378 states and 63863 transitions. [2021-03-10 21:17:24,556 INFO L78 Accepts]: Start accepts. Automaton has 25378 states and 63863 transitions. Word has length 59 [2021-03-10 21:17:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:24,556 INFO L480 AbstractCegarLoop]: Abstraction has 25378 states and 63863 transitions. [2021-03-10 21:17:24,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 25378 states and 63863 transitions. [2021-03-10 21:17:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:24,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:24,570 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:24,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1025,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:24,771 INFO L428 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:24,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1832135101, now seen corresponding path program 289 times [2021-03-10 21:17:24,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:24,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744971593] [2021-03-10 21:17:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:24,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744971593] [2021-03-10 21:17:24,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717098475] [2021-03-10 21:17:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:17:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:25,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:25,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:17:25,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269706873] [2021-03-10 21:17:25,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:17:25,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:25,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:17:25,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:17:25,060 INFO L87 Difference]: Start difference. First operand 25378 states and 63863 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:26,295 INFO L93 Difference]: Finished difference Result 29088 states and 71830 transitions. [2021-03-10 21:17:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:17:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:26,328 INFO L225 Difference]: With dead ends: 29088 [2021-03-10 21:17:26,328 INFO L226 Difference]: Without dead ends: 29034 [2021-03-10 21:17:26,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:17:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29034 states. [2021-03-10 21:17:26,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29034 to 25785. [2021-03-10 21:17:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25785 states, 25784 states have (on average 2.52012876202296) internal successors, (64979), 25784 states have internal predecessors, (64979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25785 states to 25785 states and 64979 transitions. [2021-03-10 21:17:26,672 INFO L78 Accepts]: Start accepts. Automaton has 25785 states and 64979 transitions. Word has length 59 [2021-03-10 21:17:26,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:26,672 INFO L480 AbstractCegarLoop]: Abstraction has 25785 states and 64979 transitions. [2021-03-10 21:17:26,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:26,672 INFO L276 IsEmpty]: Start isEmpty. Operand 25785 states and 64979 transitions. [2021-03-10 21:17:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:26,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:26,686 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:26,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-03-10 21:17:26,886 INFO L428 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -930273086, now seen corresponding path program 290 times [2021-03-10 21:17:26,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:26,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115764367] [2021-03-10 21:17:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:26,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115764367] [2021-03-10 21:17:26,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947872885] [2021-03-10 21:17:26,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:27,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:27,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:27,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:27,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:27,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:27,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:17:27,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094595599] [2021-03-10 21:17:27,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:17:27,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:27,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:17:27,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:17:27,161 INFO L87 Difference]: Start difference. First operand 25785 states and 64979 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:27,458 INFO L93 Difference]: Finished difference Result 29512 states and 72476 transitions. [2021-03-10 21:17:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:17:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:27,491 INFO L225 Difference]: With dead ends: 29512 [2021-03-10 21:17:27,491 INFO L226 Difference]: Without dead ends: 29488 [2021-03-10 21:17:27,492 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29488 states. [2021-03-10 21:17:27,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29488 to 25781. [2021-03-10 21:17:27,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25781 states, 25780 states have (on average 2.519511249030256) internal successors, (64953), 25780 states have internal predecessors, (64953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25781 states to 25781 states and 64953 transitions. [2021-03-10 21:17:27,838 INFO L78 Accepts]: Start accepts. Automaton has 25781 states and 64953 transitions. Word has length 59 [2021-03-10 21:17:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:27,838 INFO L480 AbstractCegarLoop]: Abstraction has 25781 states and 64953 transitions. [2021-03-10 21:17:27,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 25781 states and 64953 transitions. [2021-03-10 21:17:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:27,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:27,853 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:28,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1027,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:28,053 INFO L428 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:28,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1986971635, now seen corresponding path program 291 times [2021-03-10 21:17:28,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:28,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925159233] [2021-03-10 21:17:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:28,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925159233] [2021-03-10 21:17:28,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186774797] [2021-03-10 21:17:28,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:28,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 21:17:28,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:17:28,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:28,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:28,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:17:28,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363871273] [2021-03-10 21:17:28,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:17:28,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:28,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:17:28,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:17:28,456 INFO L87 Difference]: Start difference. First operand 25781 states and 64953 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:30,260 INFO L93 Difference]: Finished difference Result 33993 states and 83029 transitions. [2021-03-10 21:17:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 21:17:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:30,299 INFO L225 Difference]: With dead ends: 33993 [2021-03-10 21:17:30,299 INFO L226 Difference]: Without dead ends: 33825 [2021-03-10 21:17:30,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 738.8ms TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:17:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33825 states. [2021-03-10 21:17:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33825 to 26608. [2021-03-10 21:17:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26608 states, 26607 states have (on average 2.5243732852256926) internal successors, (67166), 26607 states have internal predecessors, (67166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26608 states to 26608 states and 67166 transitions. [2021-03-10 21:17:30,688 INFO L78 Accepts]: Start accepts. Automaton has 26608 states and 67166 transitions. Word has length 59 [2021-03-10 21:17:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:30,688 INFO L480 AbstractCegarLoop]: Abstraction has 26608 states and 67166 transitions. [2021-03-10 21:17:30,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26608 states and 67166 transitions. [2021-03-10 21:17:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:30,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:30,702 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:30,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1031,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:30,902 INFO L428 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:30,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:30,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1921392984, now seen corresponding path program 292 times [2021-03-10 21:17:30,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:30,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533085942] [2021-03-10 21:17:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:31,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533085942] [2021-03-10 21:17:31,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614311923] [2021-03-10 21:17:31,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:31,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:31,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:31,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:31,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:31,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:31,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:17:31,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54385262] [2021-03-10 21:17:31,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:17:31,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:31,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:17:31,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:17:31,206 INFO L87 Difference]: Start difference. First operand 26608 states and 67166 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:31,569 INFO L93 Difference]: Finished difference Result 30548 states and 75068 transitions. [2021-03-10 21:17:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:17:31,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:31,606 INFO L225 Difference]: With dead ends: 30548 [2021-03-10 21:17:31,607 INFO L226 Difference]: Without dead ends: 30515 [2021-03-10 21:17:31,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:17:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30515 states. [2021-03-10 21:17:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30515 to 26608. [2021-03-10 21:17:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26608 states, 26607 states have (on average 2.5240350283759914) internal successors, (67157), 26607 states have internal predecessors, (67157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26608 states to 26608 states and 67157 transitions. [2021-03-10 21:17:31,975 INFO L78 Accepts]: Start accepts. Automaton has 26608 states and 67157 transitions. Word has length 59 [2021-03-10 21:17:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:31,975 INFO L480 AbstractCegarLoop]: Abstraction has 26608 states and 67157 transitions. [2021-03-10 21:17:31,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26608 states and 67157 transitions. [2021-03-10 21:17:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:31,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:31,990 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:32,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:32,190 INFO L428 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:32,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1927280125, now seen corresponding path program 293 times [2021-03-10 21:17:32,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:32,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462943024] [2021-03-10 21:17:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:32,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462943024] [2021-03-10 21:17:32,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331613070] [2021-03-10 21:17:32,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:32,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-03-10 21:17:32,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:17:32,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:32,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:32,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:17:32,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133395649] [2021-03-10 21:17:32,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:32,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:32,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:32,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:32,753 INFO L87 Difference]: Start difference. First operand 26608 states and 67157 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:35,595 INFO L93 Difference]: Finished difference Result 44488 states and 107152 transitions. [2021-03-10 21:17:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-03-10 21:17:35,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:35,648 INFO L225 Difference]: With dead ends: 44488 [2021-03-10 21:17:35,648 INFO L226 Difference]: Without dead ends: 44032 [2021-03-10 21:17:35,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 1715.5ms TimeCoverageRelationStatistics Valid=813, Invalid=8499, Unknown=0, NotChecked=0, Total=9312 [2021-03-10 21:17:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44032 states. [2021-03-10 21:17:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44032 to 28046. [2021-03-10 21:17:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28046 states, 28045 states have (on average 2.530611517204493) internal successors, (70971), 28045 states have internal predecessors, (70971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28046 states to 28046 states and 70971 transitions. [2021-03-10 21:17:36,114 INFO L78 Accepts]: Start accepts. Automaton has 28046 states and 70971 transitions. Word has length 59 [2021-03-10 21:17:36,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:36,114 INFO L480 AbstractCegarLoop]: Abstraction has 28046 states and 70971 transitions. [2021-03-10 21:17:36,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 28046 states and 70971 transitions. [2021-03-10 21:17:36,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:36,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:36,128 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:36,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1037,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:36,329 INFO L428 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:36,329 INFO L82 PathProgramCache]: Analyzing trace with hash -474114302, now seen corresponding path program 294 times [2021-03-10 21:17:36,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:36,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126139423] [2021-03-10 21:17:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126139423] [2021-03-10 21:17:36,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205664611] [2021-03-10 21:17:36,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:36,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-03-10 21:17:36,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:36,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:36,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:36,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:36,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 21:17:36,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122415171] [2021-03-10 21:17:36,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:36,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:36,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:36,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:36,658 INFO L87 Difference]: Start difference. First operand 28046 states and 70971 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:37,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:37,012 INFO L93 Difference]: Finished difference Result 32348 states and 79562 transitions. [2021-03-10 21:17:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:17:37,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:37,049 INFO L225 Difference]: With dead ends: 32348 [2021-03-10 21:17:37,049 INFO L226 Difference]: Without dead ends: 32306 [2021-03-10 21:17:37,049 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:17:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32306 states. [2021-03-10 21:17:37,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32306 to 28046. [2021-03-10 21:17:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28046 states, 28045 states have (on average 2.5302906043858084) internal successors, (70962), 28045 states have internal predecessors, (70962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28046 states to 28046 states and 70962 transitions. [2021-03-10 21:17:37,438 INFO L78 Accepts]: Start accepts. Automaton has 28046 states and 70962 transitions. Word has length 59 [2021-03-10 21:17:37,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:37,438 INFO L480 AbstractCegarLoop]: Abstraction has 28046 states and 70962 transitions. [2021-03-10 21:17:37,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:37,438 INFO L276 IsEmpty]: Start isEmpty. Operand 28046 states and 70962 transitions. [2021-03-10 21:17:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:37,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:37,452 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:37,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1038 [2021-03-10 21:17:37,653 INFO L428 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:37,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:37,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1773966259, now seen corresponding path program 295 times [2021-03-10 21:17:37,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:37,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974245364] [2021-03-10 21:17:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:37,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974245364] [2021-03-10 21:17:37,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323261028] [2021-03-10 21:17:37,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:17:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:37,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:37,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:17:37,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002049991] [2021-03-10 21:17:37,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:37,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:37,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:37,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:37,992 INFO L87 Difference]: Start difference. First operand 28046 states and 70962 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:42,428 INFO L93 Difference]: Finished difference Result 68430 states and 161683 transitions. [2021-03-10 21:17:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-03-10 21:17:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:42,514 INFO L225 Difference]: With dead ends: 68430 [2021-03-10 21:17:42,514 INFO L226 Difference]: Without dead ends: 67044 [2021-03-10 21:17:42,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10598 ImplicationChecksByTransitivity, 2978.7ms TimeCoverageRelationStatistics Valid=1947, Invalid=23813, Unknown=0, NotChecked=0, Total=25760 [2021-03-10 21:17:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67044 states. [2021-03-10 21:17:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67044 to 30259. [2021-03-10 21:17:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30259 states, 30258 states have (on average 2.539196245620993) internal successors, (76831), 30258 states have internal predecessors, (76831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:43,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30259 states to 30259 states and 76831 transitions. [2021-03-10 21:17:43,167 INFO L78 Accepts]: Start accepts. Automaton has 30259 states and 76831 transitions. Word has length 59 [2021-03-10 21:17:43,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:43,167 INFO L480 AbstractCegarLoop]: Abstraction has 30259 states and 76831 transitions. [2021-03-10 21:17:43,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:43,167 INFO L276 IsEmpty]: Start isEmpty. Operand 30259 states and 76831 transitions. [2021-03-10 21:17:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:43,182 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:43,182 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:43,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1044 [2021-03-10 21:17:43,383 INFO L428 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583384, now seen corresponding path program 296 times [2021-03-10 21:17:43,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:43,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294645051] [2021-03-10 21:17:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:43,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294645051] [2021-03-10 21:17:43,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258626646] [2021-03-10 21:17:43,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:43,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:43,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:43,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:43,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:43,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:43,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 21:17:43,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300723055] [2021-03-10 21:17:43,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:43,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:43,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:43,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:43,725 INFO L87 Difference]: Start difference. First operand 30259 states and 76831 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:44,196 INFO L93 Difference]: Finished difference Result 35141 states and 86522 transitions. [2021-03-10 21:17:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:17:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:44,239 INFO L225 Difference]: With dead ends: 35141 [2021-03-10 21:17:44,239 INFO L226 Difference]: Without dead ends: 35090 [2021-03-10 21:17:44,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:17:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35090 states. [2021-03-10 21:17:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35090 to 30259. [2021-03-10 21:17:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30259 states, 30258 states have (on average 2.5388988036221827) internal successors, (76822), 30258 states have internal predecessors, (76822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30259 states to 30259 states and 76822 transitions. [2021-03-10 21:17:44,730 INFO L78 Accepts]: Start accepts. Automaton has 30259 states and 76822 transitions. Word has length 59 [2021-03-10 21:17:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:44,730 INFO L480 AbstractCegarLoop]: Abstraction has 30259 states and 76822 transitions. [2021-03-10 21:17:44,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand 30259 states and 76822 transitions. [2021-03-10 21:17:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:44,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:44,745 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:44,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1045 [2021-03-10 21:17:44,945 INFO L428 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash -49180099, now seen corresponding path program 297 times [2021-03-10 21:17:44,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:44,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617917875] [2021-03-10 21:17:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:45,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617917875] [2021-03-10 21:17:45,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726015420] [2021-03-10 21:17:45,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:45,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-03-10 21:17:45,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:45,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:17:45,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:45,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:45,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:17:45,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319127379] [2021-03-10 21:17:45,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:17:45,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:45,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:17:45,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:17:45,339 INFO L87 Difference]: Start difference. First operand 30259 states and 76822 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:52,741 INFO L93 Difference]: Finished difference Result 85430 states and 203006 transitions. [2021-03-10 21:17:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-03-10 21:17:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:52,845 INFO L225 Difference]: With dead ends: 85430 [2021-03-10 21:17:52,845 INFO L226 Difference]: Without dead ends: 84110 [2021-03-10 21:17:52,848 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29073 ImplicationChecksByTransitivity, 5765.4ms TimeCoverageRelationStatistics Valid=4377, Invalid=61415, Unknown=0, NotChecked=0, Total=65792 [2021-03-10 21:17:52,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84110 states. [2021-03-10 21:17:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84110 to 32058. [2021-03-10 21:17:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32058 states, 32057 states have (on average 2.5430327229622236) internal successors, (81522), 32057 states have internal predecessors, (81522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32058 states to 32058 states and 81522 transitions. [2021-03-10 21:17:53,590 INFO L78 Accepts]: Start accepts. Automaton has 32058 states and 81522 transitions. Word has length 59 [2021-03-10 21:17:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:53,590 INFO L480 AbstractCegarLoop]: Abstraction has 32058 states and 81522 transitions. [2021-03-10 21:17:53,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 32058 states and 81522 transitions. [2021-03-10 21:17:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:53,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:53,605 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:53,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1052 [2021-03-10 21:17:53,805 INFO L428 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:53,805 INFO L82 PathProgramCache]: Analyzing trace with hash 32658754, now seen corresponding path program 298 times [2021-03-10 21:17:53,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:53,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408201640] [2021-03-10 21:17:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:53,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408201640] [2021-03-10 21:17:53,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057807915] [2021-03-10 21:17:53,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:54,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:54,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:54,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:54,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:54,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:54,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-03-10 21:17:54,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369283204] [2021-03-10 21:17:54,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:17:54,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:54,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:17:54,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:17:54,180 INFO L87 Difference]: Start difference. First operand 32058 states and 81522 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:54,689 INFO L93 Difference]: Finished difference Result 37166 states and 91664 transitions. [2021-03-10 21:17:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:17:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:54,731 INFO L225 Difference]: With dead ends: 37166 [2021-03-10 21:17:54,731 INFO L226 Difference]: Without dead ends: 37106 [2021-03-10 21:17:54,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37106 states. [2021-03-10 21:17:55,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37106 to 31771. [2021-03-10 21:17:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31771 states, 31770 states have (on average 2.5417689644318537) internal successors, (80752), 31770 states have internal predecessors, (80752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31771 states to 31771 states and 80752 transitions. [2021-03-10 21:17:55,186 INFO L78 Accepts]: Start accepts. Automaton has 31771 states and 80752 transitions. Word has length 59 [2021-03-10 21:17:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:55,186 INFO L480 AbstractCegarLoop]: Abstraction has 31771 states and 80752 transitions. [2021-03-10 21:17:55,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 31771 states and 80752 transitions. [2021-03-10 21:17:55,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:55,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:55,201 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:55,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:55,402 INFO L428 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:55,402 INFO L82 PathProgramCache]: Analyzing trace with hash 754093939, now seen corresponding path program 299 times [2021-03-10 21:17:55,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:55,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307712721] [2021-03-10 21:17:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:55,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307712721] [2021-03-10 21:17:55,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524985923] [2021-03-10 21:17:55,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:55,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-03-10 21:17:55,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:17:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:55,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:55,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:17:55,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253508839] [2021-03-10 21:17:55,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:17:55,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:55,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:17:55,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:17:55,797 INFO L87 Difference]: Start difference. First operand 31771 states and 80752 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:57,355 INFO L93 Difference]: Finished difference Result 47671 states and 113796 transitions. [2021-03-10 21:17:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:17:57,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:57,405 INFO L225 Difference]: With dead ends: 47671 [2021-03-10 21:17:57,406 INFO L226 Difference]: Without dead ends: 45889 [2021-03-10 21:17:57,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 623.2ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:17:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45889 states. [2021-03-10 21:17:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45889 to 24649. [2021-03-10 21:17:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24649 states, 24648 states have (on average 2.5122525154170723) internal successors, (61922), 24648 states have internal predecessors, (61922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24649 states to 24649 states and 61922 transitions. [2021-03-10 21:17:57,835 INFO L78 Accepts]: Start accepts. Automaton has 24649 states and 61922 transitions. Word has length 59 [2021-03-10 21:17:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:57,835 INFO L480 AbstractCegarLoop]: Abstraction has 24649 states and 61922 transitions. [2021-03-10 21:17:57,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 24649 states and 61922 transitions. [2021-03-10 21:17:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:57,849 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:57,849 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:58,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1061 [2021-03-10 21:17:58,050 INFO L428 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash 516032422, now seen corresponding path program 155 times [2021-03-10 21:17:58,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:58,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261291528] [2021-03-10 21:17:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:58,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261291528] [2021-03-10 21:17:58,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280850496] [2021-03-10 21:17:58,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:58,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-03-10 21:17:58,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:58,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:58,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:58,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:58,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-03-10 21:17:58,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524199051] [2021-03-10 21:17:58,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:17:58,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:58,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:17:58,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:17:58,408 INFO L87 Difference]: Start difference. First operand 24649 states and 61922 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:59,051 INFO L93 Difference]: Finished difference Result 28572 states and 70035 transitions. [2021-03-10 21:17:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:17:59,053 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:17:59,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:59,087 INFO L225 Difference]: With dead ends: 28572 [2021-03-10 21:17:59,088 INFO L226 Difference]: Without dead ends: 28558 [2021-03-10 21:17:59,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:59,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28558 states. [2021-03-10 21:17:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28558 to 25087. [2021-03-10 21:17:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25087 states, 25086 states have (on average 2.5137925536155623) internal successors, (63061), 25086 states have internal predecessors, (63061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25087 states to 25087 states and 63061 transitions. [2021-03-10 21:17:59,443 INFO L78 Accepts]: Start accepts. Automaton has 25087 states and 63061 transitions. Word has length 59 [2021-03-10 21:17:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:59,443 INFO L480 AbstractCegarLoop]: Abstraction has 25087 states and 63061 transitions. [2021-03-10 21:17:59,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 25087 states and 63061 transitions. [2021-03-10 21:17:59,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:17:59,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:59,458 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:59,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:59,658 INFO L428 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:59,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:59,658 INFO L82 PathProgramCache]: Analyzing trace with hash -105847988, now seen corresponding path program 156 times [2021-03-10 21:17:59,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:59,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367783367] [2021-03-10 21:17:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:59,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367783367] [2021-03-10 21:17:59,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047845163] [2021-03-10 21:17:59,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:59,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-03-10 21:17:59,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:17:59,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:59,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:59,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:17:59,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864538448] [2021-03-10 21:17:59,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:17:59,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:59,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:17:59,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:17:59,970 INFO L87 Difference]: Start difference. First operand 25087 states and 63061 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:00,550 INFO L93 Difference]: Finished difference Result 33920 states and 82457 transitions. [2021-03-10 21:18:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:18:00,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:00,594 INFO L225 Difference]: With dead ends: 33920 [2021-03-10 21:18:00,594 INFO L226 Difference]: Without dead ends: 33920 [2021-03-10 21:18:00,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33920 states. [2021-03-10 21:18:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33920 to 25091. [2021-03-10 21:18:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25091 states, 25090 states have (on average 2.513870067756078) internal successors, (63073), 25090 states have internal predecessors, (63073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25091 states to 25091 states and 63073 transitions. [2021-03-10 21:18:01,060 INFO L78 Accepts]: Start accepts. Automaton has 25091 states and 63073 transitions. Word has length 59 [2021-03-10 21:18:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:01,060 INFO L480 AbstractCegarLoop]: Abstraction has 25091 states and 63073 transitions. [2021-03-10 21:18:01,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 25091 states and 63073 transitions. [2021-03-10 21:18:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:01,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:01,075 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:01,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:01,290 INFO L428 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:01,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1743420444, now seen corresponding path program 157 times [2021-03-10 21:18:01,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:01,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834253413] [2021-03-10 21:18:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:01,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834253413] [2021-03-10 21:18:01,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842013809] [2021-03-10 21:18:01,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:01,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:01,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:01,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:01,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:18:01,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665575012] [2021-03-10 21:18:01,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:01,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:01,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:01,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:01,661 INFO L87 Difference]: Start difference. First operand 25091 states and 63073 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:02,430 INFO L93 Difference]: Finished difference Result 37323 states and 90447 transitions. [2021-03-10 21:18:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:18:02,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:02,475 INFO L225 Difference]: With dead ends: 37323 [2021-03-10 21:18:02,475 INFO L226 Difference]: Without dead ends: 37323 [2021-03-10 21:18:02,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:18:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37323 states. [2021-03-10 21:18:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37323 to 25107. [2021-03-10 21:18:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25107 states, 25106 states have (on average 2.5142595395522984) internal successors, (63123), 25106 states have internal predecessors, (63123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25107 states to 25107 states and 63123 transitions. [2021-03-10 21:18:02,883 INFO L78 Accepts]: Start accepts. Automaton has 25107 states and 63123 transitions. Word has length 59 [2021-03-10 21:18:02,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:02,883 INFO L480 AbstractCegarLoop]: Abstraction has 25107 states and 63123 transitions. [2021-03-10 21:18:02,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:02,883 INFO L276 IsEmpty]: Start isEmpty. Operand 25107 states and 63123 transitions. [2021-03-10 21:18:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:02,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:02,897 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:03,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:03,098 INFO L428 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:03,098 INFO L82 PathProgramCache]: Analyzing trace with hash 861551688, now seen corresponding path program 158 times [2021-03-10 21:18:03,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:03,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320231745] [2021-03-10 21:18:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:03,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320231745] [2021-03-10 21:18:03,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561339672] [2021-03-10 21:18:03,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:03,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:03,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:03,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:03,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:03,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-03-10 21:18:03,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084188271] [2021-03-10 21:18:03,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:18:03,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:03,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:18:03,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:18:03,429 INFO L87 Difference]: Start difference. First operand 25107 states and 63123 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:04,168 INFO L93 Difference]: Finished difference Result 38773 states and 93895 transitions. [2021-03-10 21:18:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:18:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:04,214 INFO L225 Difference]: With dead ends: 38773 [2021-03-10 21:18:04,214 INFO L226 Difference]: Without dead ends: 38773 [2021-03-10 21:18:04,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 367.5ms TimeCoverageRelationStatistics Valid=375, Invalid=617, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:18:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38773 states. [2021-03-10 21:18:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38773 to 25129. [2021-03-10 21:18:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25129 states, 25128 states have (on average 2.514764406240051) internal successors, (63191), 25128 states have internal predecessors, (63191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25129 states to 25129 states and 63191 transitions. [2021-03-10 21:18:04,600 INFO L78 Accepts]: Start accepts. Automaton has 25129 states and 63191 transitions. Word has length 59 [2021-03-10 21:18:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:04,601 INFO L480 AbstractCegarLoop]: Abstraction has 25129 states and 63191 transitions. [2021-03-10 21:18:04,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 25129 states and 63191 transitions. [2021-03-10 21:18:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:04,614 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:04,614 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:04,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-03-10 21:18:04,814 INFO L428 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:04,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:04,814 INFO L82 PathProgramCache]: Analyzing trace with hash -177735324, now seen corresponding path program 159 times [2021-03-10 21:18:04,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:04,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448349147] [2021-03-10 21:18:04,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:04,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448349147] [2021-03-10 21:18:04,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506934130] [2021-03-10 21:18:04,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:05,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-03-10 21:18:05,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:05,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:05,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:05,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:05,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-03-10 21:18:05,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485905963] [2021-03-10 21:18:05,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:05,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:05,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:05,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:05,178 INFO L87 Difference]: Start difference. First operand 25129 states and 63191 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:06,206 INFO L93 Difference]: Finished difference Result 38603 states and 93546 transitions. [2021-03-10 21:18:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:18:06,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:06,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:06,245 INFO L225 Difference]: With dead ends: 38603 [2021-03-10 21:18:06,245 INFO L226 Difference]: Without dead ends: 38603 [2021-03-10 21:18:06,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=448, Invalid=742, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:18:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38603 states. [2021-03-10 21:18:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38603 to 25157. [2021-03-10 21:18:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25157 states, 25156 states have (on average 2.515384003816187) internal successors, (63277), 25156 states have internal predecessors, (63277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25157 states to 25157 states and 63277 transitions. [2021-03-10 21:18:06,623 INFO L78 Accepts]: Start accepts. Automaton has 25157 states and 63277 transitions. Word has length 59 [2021-03-10 21:18:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:06,623 INFO L480 AbstractCegarLoop]: Abstraction has 25157 states and 63277 transitions. [2021-03-10 21:18:06,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 25157 states and 63277 transitions. [2021-03-10 21:18:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:06,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:06,637 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:06,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-03-10 21:18:06,838 INFO L428 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash 842127048, now seen corresponding path program 160 times [2021-03-10 21:18:06,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:06,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332027860] [2021-03-10 21:18:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:07,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332027860] [2021-03-10 21:18:07,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898403425] [2021-03-10 21:18:07,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:07,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:07,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:07,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:07,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:07,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:07,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-03-10 21:18:07,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523148392] [2021-03-10 21:18:07,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:18:07,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:07,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:18:07,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:18:07,216 INFO L87 Difference]: Start difference. First operand 25157 states and 63277 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:08,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:08,221 INFO L93 Difference]: Finished difference Result 36852 states and 89490 transitions. [2021-03-10 21:18:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:18:08,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:08,265 INFO L225 Difference]: With dead ends: 36852 [2021-03-10 21:18:08,265 INFO L226 Difference]: Without dead ends: 36852 [2021-03-10 21:18:08,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=473, Invalid=787, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:18:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36852 states. [2021-03-10 21:18:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36852 to 25191. [2021-03-10 21:18:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 2.5161175069472015) internal successors, (63381), 25190 states have internal predecessors, (63381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 63381 transitions. [2021-03-10 21:18:08,664 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 63381 transitions. Word has length 59 [2021-03-10 21:18:08,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:08,665 INFO L480 AbstractCegarLoop]: Abstraction has 25191 states and 63381 transitions. [2021-03-10 21:18:08,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 63381 transitions. [2021-03-10 21:18:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:08,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:08,680 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:08,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1068,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:08,880 INFO L428 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:08,880 INFO L82 PathProgramCache]: Analyzing trace with hash 963399396, now seen corresponding path program 161 times [2021-03-10 21:18:08,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:08,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974835091] [2021-03-10 21:18:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 112 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:09,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974835091] [2021-03-10 21:18:09,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647502142] [2021-03-10 21:18:09,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:09,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-03-10 21:18:09,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:09,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:09,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:09,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:09,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-03-10 21:18:09,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664342863] [2021-03-10 21:18:09,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:18:09,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:09,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:18:09,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:18:09,387 INFO L87 Difference]: Start difference. First operand 25191 states and 63381 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:10,753 INFO L93 Difference]: Finished difference Result 33675 states and 81957 transitions. [2021-03-10 21:18:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:18:10,755 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:10,796 INFO L225 Difference]: With dead ends: 33675 [2021-03-10 21:18:10,796 INFO L226 Difference]: Without dead ends: 33675 [2021-03-10 21:18:10,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=617, Invalid=1189, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:18:10,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33675 states. [2021-03-10 21:18:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33675 to 25231. [2021-03-10 21:18:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25231 states, 25230 states have (on average 2.5169639318271897) internal successors, (63503), 25230 states have internal predecessors, (63503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25231 states to 25231 states and 63503 transitions. [2021-03-10 21:18:11,228 INFO L78 Accepts]: Start accepts. Automaton has 25231 states and 63503 transitions. Word has length 59 [2021-03-10 21:18:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:11,228 INFO L480 AbstractCegarLoop]: Abstraction has 25231 states and 63503 transitions. [2021-03-10 21:18:11,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 25231 states and 63503 transitions. [2021-03-10 21:18:11,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:11,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:11,242 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:11,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-03-10 21:18:11,442 INFO L428 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:11,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1720422728, now seen corresponding path program 162 times [2021-03-10 21:18:11,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:11,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920580010] [2021-03-10 21:18:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:11,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920580010] [2021-03-10 21:18:11,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130653202] [2021-03-10 21:18:11,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:11,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-03-10 21:18:11,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:11,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:11,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:11,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:11,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2021-03-10 21:18:11,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693232925] [2021-03-10 21:18:11,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:18:11,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:11,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:18:11,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:18:11,881 INFO L87 Difference]: Start difference. First operand 25231 states and 63503 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:12,663 INFO L93 Difference]: Finished difference Result 29346 states and 71932 transitions. [2021-03-10 21:18:12,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:18:12,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:12,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:12,700 INFO L225 Difference]: With dead ends: 29346 [2021-03-10 21:18:12,700 INFO L226 Difference]: Without dead ends: 29346 [2021-03-10 21:18:12,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=347, Invalid=645, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:18:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29346 states. [2021-03-10 21:18:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29346 to 24130. [2021-03-10 21:18:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24130 states, 24129 states have (on average 2.5107961374279912) internal successors, (60583), 24129 states have internal predecessors, (60583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24130 states to 24130 states and 60583 transitions. [2021-03-10 21:18:13,027 INFO L78 Accepts]: Start accepts. Automaton has 24130 states and 60583 transitions. Word has length 59 [2021-03-10 21:18:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:13,027 INFO L480 AbstractCegarLoop]: Abstraction has 24130 states and 60583 transitions. [2021-03-10 21:18:13,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 24130 states and 60583 transitions. [2021-03-10 21:18:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:13,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:13,040 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:13,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-03-10 21:18:13,241 INFO L428 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1305517528, now seen corresponding path program 300 times [2021-03-10 21:18:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:13,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970512034] [2021-03-10 21:18:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970512034] [2021-03-10 21:18:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153770780] [2021-03-10 21:18:13,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:13,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:18:13,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:13,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:13,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-03-10 21:18:13,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949660958] [2021-03-10 21:18:13,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:18:13,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:13,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:18:13,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:18:13,654 INFO L87 Difference]: Start difference. First operand 24130 states and 60583 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:14,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:14,225 INFO L93 Difference]: Finished difference Result 27458 states and 67331 transitions. [2021-03-10 21:18:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:18:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:14,259 INFO L225 Difference]: With dead ends: 27458 [2021-03-10 21:18:14,259 INFO L226 Difference]: Without dead ends: 27395 [2021-03-10 21:18:14,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:18:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27395 states. [2021-03-10 21:18:14,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27395 to 24139. [2021-03-10 21:18:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24139 states, 24138 states have (on average 2.510232827906206) internal successors, (60592), 24138 states have internal predecessors, (60592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24139 states to 24139 states and 60592 transitions. [2021-03-10 21:18:14,578 INFO L78 Accepts]: Start accepts. Automaton has 24139 states and 60592 transitions. Word has length 59 [2021-03-10 21:18:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:14,578 INFO L480 AbstractCegarLoop]: Abstraction has 24139 states and 60592 transitions. [2021-03-10 21:18:14,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand 24139 states and 60592 transitions. [2021-03-10 21:18:14,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:14,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:14,593 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:14,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:14,793 INFO L428 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:14,793 INFO L82 PathProgramCache]: Analyzing trace with hash 917069046, now seen corresponding path program 301 times [2021-03-10 21:18:14,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:14,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030737391] [2021-03-10 21:18:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:15,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030737391] [2021-03-10 21:18:15,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146665708] [2021-03-10 21:18:15,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:15,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:15,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:15,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:15,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-03-10 21:18:15,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590378479] [2021-03-10 21:18:15,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:18:15,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:15,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:18:15,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:18:15,238 INFO L87 Difference]: Start difference. First operand 24139 states and 60592 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:16,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:16,032 INFO L93 Difference]: Finished difference Result 27436 states and 67851 transitions. [2021-03-10 21:18:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:18:16,033 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:16,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:16,065 INFO L225 Difference]: With dead ends: 27436 [2021-03-10 21:18:16,066 INFO L226 Difference]: Without dead ends: 27436 [2021-03-10 21:18:16,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 436.9ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:18:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27436 states. [2021-03-10 21:18:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27436 to 24090. [2021-03-10 21:18:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24090 states, 24089 states have (on average 2.517248536676491) internal successors, (60638), 24089 states have internal predecessors, (60638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24090 states to 24090 states and 60638 transitions. [2021-03-10 21:18:16,444 INFO L78 Accepts]: Start accepts. Automaton has 24090 states and 60638 transitions. Word has length 59 [2021-03-10 21:18:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:16,444 INFO L480 AbstractCegarLoop]: Abstraction has 24090 states and 60638 transitions. [2021-03-10 21:18:16,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 24090 states and 60638 transitions. [2021-03-10 21:18:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:16,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:16,459 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:16,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-03-10 21:18:16,659 INFO L428 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:16,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1740888523, now seen corresponding path program 163 times [2021-03-10 21:18:16,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:16,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335145160] [2021-03-10 21:18:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:16,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335145160] [2021-03-10 21:18:16,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548620320] [2021-03-10 21:18:16,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:16,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:17,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:17,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:18:17,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231805504] [2021-03-10 21:18:17,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:18:17,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:17,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:18:17,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:18:17,083 INFO L87 Difference]: Start difference. First operand 24090 states and 60638 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:18,490 INFO L93 Difference]: Finished difference Result 36609 states and 89922 transitions. [2021-03-10 21:18:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:18:18,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:18,531 INFO L225 Difference]: With dead ends: 36609 [2021-03-10 21:18:18,531 INFO L226 Difference]: Without dead ends: 36495 [2021-03-10 21:18:18,531 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 660.0ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:18:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36495 states. [2021-03-10 21:18:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36495 to 23177. [2021-03-10 21:18:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23177 states, 23176 states have (on average 2.5117362789092166) internal successors, (58212), 23176 states have internal predecessors, (58212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23177 states to 23177 states and 58212 transitions. [2021-03-10 21:18:18,873 INFO L78 Accepts]: Start accepts. Automaton has 23177 states and 58212 transitions. Word has length 59 [2021-03-10 21:18:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:18,873 INFO L480 AbstractCegarLoop]: Abstraction has 23177 states and 58212 transitions. [2021-03-10 21:18:18,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:18,873 INFO L276 IsEmpty]: Start isEmpty. Operand 23177 states and 58212 transitions. [2021-03-10 21:18:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:18,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:18,887 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:19,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:19,087 INFO L428 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:19,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:19,087 INFO L82 PathProgramCache]: Analyzing trace with hash -652352191, now seen corresponding path program 302 times [2021-03-10 21:18:19,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:19,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295144561] [2021-03-10 21:18:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:18:19,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295144561] [2021-03-10 21:18:19,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066089037] [2021-03-10 21:18:19,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:19,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:19,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:19,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:19,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:18:19,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:19,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-03-10 21:18:19,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044343178] [2021-03-10 21:18:19,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:18:19,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:19,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:18:19,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:19,788 INFO L87 Difference]: Start difference. First operand 23177 states and 58212 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:21,553 INFO L93 Difference]: Finished difference Result 23621 states and 59048 transitions. [2021-03-10 21:18:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:18:21,555 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:21,581 INFO L225 Difference]: With dead ends: 23621 [2021-03-10 21:18:21,582 INFO L226 Difference]: Without dead ends: 23425 [2021-03-10 21:18:21,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 436.1ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:18:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23425 states. [2021-03-10 21:18:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23425 to 23177. [2021-03-10 21:18:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23177 states, 23176 states have (on average 2.5078960994131863) internal successors, (58123), 23176 states have internal predecessors, (58123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23177 states to 23177 states and 58123 transitions. [2021-03-10 21:18:21,870 INFO L78 Accepts]: Start accepts. Automaton has 23177 states and 58123 transitions. Word has length 59 [2021-03-10 21:18:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:21,870 INFO L480 AbstractCegarLoop]: Abstraction has 23177 states and 58123 transitions. [2021-03-10 21:18:21,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 23177 states and 58123 transitions. [2021-03-10 21:18:21,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:21,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:21,884 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:22,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1082,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:22,085 INFO L428 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:22,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1906115146, now seen corresponding path program 303 times [2021-03-10 21:18:22,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:22,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089994288] [2021-03-10 21:18:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:22,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089994288] [2021-03-10 21:18:22,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442672221] [2021-03-10 21:18:22,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:22,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-03-10 21:18:22,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:22,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:22,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-03-10 21:18:22,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791063226] [2021-03-10 21:18:22,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:18:22,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:22,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:18:22,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:18:22,508 INFO L87 Difference]: Start difference. First operand 23177 states and 58123 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:23,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:23,202 INFO L93 Difference]: Finished difference Result 27397 states and 67650 transitions. [2021-03-10 21:18:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:18:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:23,234 INFO L225 Difference]: With dead ends: 27397 [2021-03-10 21:18:23,234 INFO L226 Difference]: Without dead ends: 27397 [2021-03-10 21:18:23,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:18:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27397 states. [2021-03-10 21:18:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27397 to 23434. [2021-03-10 21:18:23,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23434 states, 23433 states have (on average 2.517091281526053) internal successors, (58983), 23433 states have internal predecessors, (58983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23434 states to 23434 states and 58983 transitions. [2021-03-10 21:18:23,552 INFO L78 Accepts]: Start accepts. Automaton has 23434 states and 58983 transitions. Word has length 59 [2021-03-10 21:18:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:23,553 INFO L480 AbstractCegarLoop]: Abstraction has 23434 states and 58983 transitions. [2021-03-10 21:18:23,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 23434 states and 58983 transitions. [2021-03-10 21:18:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:23,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:23,567 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:23,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1083,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:23,767 INFO L428 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:23,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2141933289, now seen corresponding path program 164 times [2021-03-10 21:18:23,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:23,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191300196] [2021-03-10 21:18:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191300196] [2021-03-10 21:18:23,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831604771] [2021-03-10 21:18:23,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:24,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:24,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:24,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:24,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:24,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:18:24,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667620158] [2021-03-10 21:18:24,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:18:24,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:24,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:18:24,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:18:24,180 INFO L87 Difference]: Start difference. First operand 23434 states and 58983 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:25,553 INFO L93 Difference]: Finished difference Result 36782 states and 90239 transitions. [2021-03-10 21:18:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:18:25,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:25,593 INFO L225 Difference]: With dead ends: 36782 [2021-03-10 21:18:25,594 INFO L226 Difference]: Without dead ends: 36702 [2021-03-10 21:18:25,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 576.4ms TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:18:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36702 states. [2021-03-10 21:18:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36702 to 22896. [2021-03-10 21:18:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22896 states, 22895 states have (on average 2.5155274077309455) internal successors, (57593), 22895 states have internal predecessors, (57593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22896 states to 22896 states and 57593 transitions. [2021-03-10 21:18:25,940 INFO L78 Accepts]: Start accepts. Automaton has 22896 states and 57593 transitions. Word has length 59 [2021-03-10 21:18:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:25,941 INFO L480 AbstractCegarLoop]: Abstraction has 22896 states and 57593 transitions. [2021-03-10 21:18:25,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 22896 states and 57593 transitions. [2021-03-10 21:18:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:25,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:25,954 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:26,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:26,154 INFO L428 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1437421899, now seen corresponding path program 304 times [2021-03-10 21:18:26,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:26,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155410410] [2021-03-10 21:18:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:18:26,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155410410] [2021-03-10 21:18:26,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107538444] [2021-03-10 21:18:26,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:26,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:26,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:26,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:26,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:18:26,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:26,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:18:26,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412511641] [2021-03-10 21:18:26,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:18:26,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:18:26,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:26,774 INFO L87 Difference]: Start difference. First operand 22896 states and 57593 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:28,275 INFO L93 Difference]: Finished difference Result 23344 states and 58396 transitions. [2021-03-10 21:18:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:18:28,277 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:28,300 INFO L225 Difference]: With dead ends: 23344 [2021-03-10 21:18:28,300 INFO L226 Difference]: Without dead ends: 23184 [2021-03-10 21:18:28,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23184 states. [2021-03-10 21:18:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23184 to 22860. [2021-03-10 21:18:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22860 states, 22859 states have (on average 2.513408285576797) internal successors, (57454), 22859 states have internal predecessors, (57454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22860 states to 22860 states and 57454 transitions. [2021-03-10 21:18:28,576 INFO L78 Accepts]: Start accepts. Automaton has 22860 states and 57454 transitions. Word has length 59 [2021-03-10 21:18:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:28,576 INFO L480 AbstractCegarLoop]: Abstraction has 22860 states and 57454 transitions. [2021-03-10 21:18:28,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:28,577 INFO L276 IsEmpty]: Start isEmpty. Operand 22860 states and 57454 transitions. [2021-03-10 21:18:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:28,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:28,590 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:28,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:28,790 INFO L428 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:28,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:28,790 INFO L82 PathProgramCache]: Analyzing trace with hash 943114416, now seen corresponding path program 165 times [2021-03-10 21:18:28,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:28,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714807768] [2021-03-10 21:18:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:18:29,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714807768] [2021-03-10 21:18:29,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020303795] [2021-03-10 21:18:29,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:29,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:18:29,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:29,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:29,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:29,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-03-10 21:18:29,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404704913] [2021-03-10 21:18:29,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:18:29,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:29,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:18:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:18:29,284 INFO L87 Difference]: Start difference. First operand 22860 states and 57454 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:29,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:29,797 INFO L93 Difference]: Finished difference Result 27017 states and 65677 transitions. [2021-03-10 21:18:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:18:29,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:29,833 INFO L225 Difference]: With dead ends: 27017 [2021-03-10 21:18:29,833 INFO L226 Difference]: Without dead ends: 26915 [2021-03-10 21:18:29,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26915 states. [2021-03-10 21:18:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26915 to 21934. [2021-03-10 21:18:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21934 states, 21933 states have (on average 2.513336068937218) internal successors, (55125), 21933 states have internal predecessors, (55125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21934 states to 21934 states and 55125 transitions. [2021-03-10 21:18:30,135 INFO L78 Accepts]: Start accepts. Automaton has 21934 states and 55125 transitions. Word has length 59 [2021-03-10 21:18:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:30,136 INFO L480 AbstractCegarLoop]: Abstraction has 21934 states and 55125 transitions. [2021-03-10 21:18:30,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 21934 states and 55125 transitions. [2021-03-10 21:18:30,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:30,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:30,148 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:30,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:30,349 INFO L428 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1178079806, now seen corresponding path program 305 times [2021-03-10 21:18:30,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:30,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889526572] [2021-03-10 21:18:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:30,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889526572] [2021-03-10 21:18:30,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258924962] [2021-03-10 21:18:30,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:30,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 21:18:30,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:30,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:30,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:30,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 17 [2021-03-10 21:18:30,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062039095] [2021-03-10 21:18:30,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:18:30,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:30,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:18:30,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:18:30,764 INFO L87 Difference]: Start difference. First operand 21934 states and 55125 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:31,440 INFO L93 Difference]: Finished difference Result 26708 states and 65998 transitions. [2021-03-10 21:18:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:18:31,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:31,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:31,473 INFO L225 Difference]: With dead ends: 26708 [2021-03-10 21:18:31,473 INFO L226 Difference]: Without dead ends: 26708 [2021-03-10 21:18:31,473 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=255, Invalid=447, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:18:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26708 states. [2021-03-10 21:18:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26708 to 22155. [2021-03-10 21:18:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22155 states, 22154 states have (on average 2.5225241491378534) internal successors, (55884), 22154 states have internal predecessors, (55884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 55884 transitions. [2021-03-10 21:18:31,777 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 55884 transitions. Word has length 59 [2021-03-10 21:18:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:31,777 INFO L480 AbstractCegarLoop]: Abstraction has 22155 states and 55884 transitions. [2021-03-10 21:18:31,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 55884 transitions. [2021-03-10 21:18:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:31,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:31,790 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:31,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-03-10 21:18:31,991 INFO L428 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:31,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:31,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1136189813, now seen corresponding path program 166 times [2021-03-10 21:18:31,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:31,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143778192] [2021-03-10 21:18:31,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:32,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143778192] [2021-03-10 21:18:32,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637414512] [2021-03-10 21:18:32,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:32,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:32,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:32,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:32,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:18:32,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424156607] [2021-03-10 21:18:32,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:32,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:32,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:32,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:32,432 INFO L87 Difference]: Start difference. First operand 22155 states and 55884 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:33,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:33,674 INFO L93 Difference]: Finished difference Result 31863 states and 78431 transitions. [2021-03-10 21:18:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:18:33,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:33,713 INFO L225 Difference]: With dead ends: 31863 [2021-03-10 21:18:33,713 INFO L226 Difference]: Without dead ends: 31833 [2021-03-10 21:18:33,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:18:33,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31833 states. [2021-03-10 21:18:33,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31833 to 21989. [2021-03-10 21:18:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21989 states, 21988 states have (on average 2.5248317263962163) internal successors, (55516), 21988 states have internal predecessors, (55516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21989 states to 21989 states and 55516 transitions. [2021-03-10 21:18:34,025 INFO L78 Accepts]: Start accepts. Automaton has 21989 states and 55516 transitions. Word has length 59 [2021-03-10 21:18:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:34,026 INFO L480 AbstractCegarLoop]: Abstraction has 21989 states and 55516 transitions. [2021-03-10 21:18:34,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 21989 states and 55516 transitions. [2021-03-10 21:18:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:34,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:34,038 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:34,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:34,238 INFO L428 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:34,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:34,238 INFO L82 PathProgramCache]: Analyzing trace with hash 656626997, now seen corresponding path program 306 times [2021-03-10 21:18:34,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:34,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719405322] [2021-03-10 21:18:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:34,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719405322] [2021-03-10 21:18:34,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375799272] [2021-03-10 21:18:34,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:34,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 21:18:34,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:34,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:35,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:35,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 21:18:35,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761836675] [2021-03-10 21:18:35,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:18:35,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:35,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:18:35,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:35,009 INFO L87 Difference]: Start difference. First operand 21989 states and 55516 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:36,624 INFO L93 Difference]: Finished difference Result 22189 states and 55839 transitions. [2021-03-10 21:18:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:18:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:36,652 INFO L225 Difference]: With dead ends: 22189 [2021-03-10 21:18:36,652 INFO L226 Difference]: Without dead ends: 22121 [2021-03-10 21:18:36,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:18:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22121 states. [2021-03-10 21:18:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22121 to 21980. [2021-03-10 21:18:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21980 states, 21979 states have (on average 2.523818190090541) internal successors, (55471), 21979 states have internal predecessors, (55471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21980 states to 21980 states and 55471 transitions. [2021-03-10 21:18:36,913 INFO L78 Accepts]: Start accepts. Automaton has 21980 states and 55471 transitions. Word has length 59 [2021-03-10 21:18:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:36,913 INFO L480 AbstractCegarLoop]: Abstraction has 21980 states and 55471 transitions. [2021-03-10 21:18:36,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 21980 states and 55471 transitions. [2021-03-10 21:18:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:36,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:36,925 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:37,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1095,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:37,126 INFO L428 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1718344478, now seen corresponding path program 167 times [2021-03-10 21:18:37,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:37,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871243817] [2021-03-10 21:18:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:37,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871243817] [2021-03-10 21:18:37,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862427503] [2021-03-10 21:18:37,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:37,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:18:37,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:37,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 67 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:37,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:37,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 19 [2021-03-10 21:18:37,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933131460] [2021-03-10 21:18:37,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:18:37,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:37,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:18:37,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:18:37,553 INFO L87 Difference]: Start difference. First operand 21980 states and 55471 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:38,184 INFO L93 Difference]: Finished difference Result 25444 states and 62319 transitions. [2021-03-10 21:18:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:18:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:38,216 INFO L225 Difference]: With dead ends: 25444 [2021-03-10 21:18:38,216 INFO L226 Difference]: Without dead ends: 25336 [2021-03-10 21:18:38,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:18:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25336 states. [2021-03-10 21:18:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25336 to 18680. [2021-03-10 21:18:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18680 states, 18679 states have (on average 2.499116655067188) internal successors, (46681), 18679 states have internal predecessors, (46681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18680 states to 18680 states and 46681 transitions. [2021-03-10 21:18:38,471 INFO L78 Accepts]: Start accepts. Automaton has 18680 states and 46681 transitions. Word has length 59 [2021-03-10 21:18:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:38,471 INFO L480 AbstractCegarLoop]: Abstraction has 18680 states and 46681 transitions. [2021-03-10 21:18:38,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 18680 states and 46681 transitions. [2021-03-10 21:18:38,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:38,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:38,481 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:38,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:38,682 INFO L428 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:38,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:38,682 INFO L82 PathProgramCache]: Analyzing trace with hash -151060374, now seen corresponding path program 307 times [2021-03-10 21:18:38,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:38,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938837176] [2021-03-10 21:18:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:38,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938837176] [2021-03-10 21:18:38,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712019787] [2021-03-10 21:18:38,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:38,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:39,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:39,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 21:18:39,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116846657] [2021-03-10 21:18:39,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:18:39,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:39,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:18:39,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:18:39,044 INFO L87 Difference]: Start difference. First operand 18680 states and 46681 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:39,576 INFO L93 Difference]: Finished difference Result 23647 states and 57961 transitions. [2021-03-10 21:18:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:18:39,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:39,604 INFO L225 Difference]: With dead ends: 23647 [2021-03-10 21:18:39,605 INFO L226 Difference]: Without dead ends: 23647 [2021-03-10 21:18:39,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:18:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23647 states. [2021-03-10 21:18:39,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23647 to 18948. [2021-03-10 21:18:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18948 states, 18947 states have (on average 2.5076793159867) internal successors, (47513), 18947 states have internal predecessors, (47513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18948 states to 18948 states and 47513 transitions. [2021-03-10 21:18:39,865 INFO L78 Accepts]: Start accepts. Automaton has 18948 states and 47513 transitions. Word has length 59 [2021-03-10 21:18:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:39,865 INFO L480 AbstractCegarLoop]: Abstraction has 18948 states and 47513 transitions. [2021-03-10 21:18:39,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 18948 states and 47513 transitions. [2021-03-10 21:18:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:39,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:39,877 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:40,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-03-10 21:18:40,077 INFO L428 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash 541310423, now seen corresponding path program 168 times [2021-03-10 21:18:40,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:40,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977492838] [2021-03-10 21:18:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:40,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977492838] [2021-03-10 21:18:40,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431763906] [2021-03-10 21:18:40,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:40,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 21:18:40,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:40,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:40,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:40,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:40,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:18:40,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132441767] [2021-03-10 21:18:40,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:18:40,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:40,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:18:40,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:18:40,459 INFO L87 Difference]: Start difference. First operand 18948 states and 47513 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:41,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:41,667 INFO L93 Difference]: Finished difference Result 24326 states and 59803 transitions. [2021-03-10 21:18:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:18:41,668 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:41,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:41,693 INFO L225 Difference]: With dead ends: 24326 [2021-03-10 21:18:41,693 INFO L226 Difference]: Without dead ends: 24296 [2021-03-10 21:18:41,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:18:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24296 states. [2021-03-10 21:18:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24296 to 18939. [2021-03-10 21:18:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18939 states, 18938 states have (on average 2.508343014045834) internal successors, (47503), 18938 states have internal predecessors, (47503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18939 states to 18939 states and 47503 transitions. [2021-03-10 21:18:41,921 INFO L78 Accepts]: Start accepts. Automaton has 18939 states and 47503 transitions. Word has length 59 [2021-03-10 21:18:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:41,921 INFO L480 AbstractCegarLoop]: Abstraction has 18939 states and 47503 transitions. [2021-03-10 21:18:41,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 18939 states and 47503 transitions. [2021-03-10 21:18:41,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:41,932 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:41,932 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:42,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1104,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:42,132 INFO L428 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash 379258327, now seen corresponding path program 308 times [2021-03-10 21:18:42,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:42,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147478641] [2021-03-10 21:18:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:42,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147478641] [2021-03-10 21:18:42,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275730843] [2021-03-10 21:18:42,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:42,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:42,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:42,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:42,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-03-10 21:18:42,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457687088] [2021-03-10 21:18:42,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:18:42,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:42,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:18:42,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:18:42,702 INFO L87 Difference]: Start difference. First operand 18939 states and 47503 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:43,903 INFO L93 Difference]: Finished difference Result 19009 states and 47622 transitions. [2021-03-10 21:18:43,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:18:43,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:43,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:43,926 INFO L225 Difference]: With dead ends: 19009 [2021-03-10 21:18:43,926 INFO L226 Difference]: Without dead ends: 18956 [2021-03-10 21:18:43,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:18:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18956 states. [2021-03-10 21:18:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18956 to 18930. [2021-03-10 21:18:44,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18930 states, 18929 states have (on average 2.5079507633789424) internal successors, (47473), 18929 states have internal predecessors, (47473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18930 states to 18930 states and 47473 transitions. [2021-03-10 21:18:44,139 INFO L78 Accepts]: Start accepts. Automaton has 18930 states and 47473 transitions. Word has length 59 [2021-03-10 21:18:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:44,140 INFO L480 AbstractCegarLoop]: Abstraction has 18930 states and 47473 transitions. [2021-03-10 21:18:44,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:44,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18930 states and 47473 transitions. [2021-03-10 21:18:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:44,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:44,150 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:44,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1105,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:44,351 INFO L428 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:44,351 INFO L82 PathProgramCache]: Analyzing trace with hash 815345346, now seen corresponding path program 309 times [2021-03-10 21:18:44,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:44,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947132793] [2021-03-10 21:18:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:44,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947132793] [2021-03-10 21:18:44,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095282807] [2021-03-10 21:18:44,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:44,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 21:18:44,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:44,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:44,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:44,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:18:44,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816373358] [2021-03-10 21:18:44,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:44,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:44,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:44,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:44,706 INFO L87 Difference]: Start difference. First operand 18930 states and 47473 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:45,192 INFO L93 Difference]: Finished difference Result 24124 states and 59226 transitions. [2021-03-10 21:18:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:18:45,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:45,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:45,223 INFO L225 Difference]: With dead ends: 24124 [2021-03-10 21:18:45,223 INFO L226 Difference]: Without dead ends: 24124 [2021-03-10 21:18:45,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:18:45,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24124 states. [2021-03-10 21:18:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24124 to 19307. [2021-03-10 21:18:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19307 states, 19306 states have (on average 2.5164197658758933) internal successors, (48582), 19306 states have internal predecessors, (48582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19307 states to 19307 states and 48582 transitions. [2021-03-10 21:18:45,480 INFO L78 Accepts]: Start accepts. Automaton has 19307 states and 48582 transitions. Word has length 59 [2021-03-10 21:18:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:45,480 INFO L480 AbstractCegarLoop]: Abstraction has 19307 states and 48582 transitions. [2021-03-10 21:18:45,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 19307 states and 48582 transitions. [2021-03-10 21:18:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:45,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:45,491 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:45,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1106 [2021-03-10 21:18:45,691 INFO L428 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:45,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1926034251, now seen corresponding path program 169 times [2021-03-10 21:18:45,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:45,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186013479] [2021-03-10 21:18:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:45,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186013479] [2021-03-10 21:18:45,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832071553] [2021-03-10 21:18:45,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:45,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:45,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:46,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:46,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:18:46,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865955444] [2021-03-10 21:18:46,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:46,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:46,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:46,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:46,149 INFO L87 Difference]: Start difference. First operand 19307 states and 48582 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:47,261 INFO L93 Difference]: Finished difference Result 22324 states and 55284 transitions. [2021-03-10 21:18:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:18:47,263 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:47,287 INFO L225 Difference]: With dead ends: 22324 [2021-03-10 21:18:47,287 INFO L226 Difference]: Without dead ends: 22324 [2021-03-10 21:18:47,287 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:18:47,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22324 states. [2021-03-10 21:18:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22324 to 18914. [2021-03-10 21:18:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18914 states, 18913 states have (on average 2.5259874160630256) internal successors, (47774), 18913 states have internal predecessors, (47774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18914 states to 18914 states and 47774 transitions. [2021-03-10 21:18:47,546 INFO L78 Accepts]: Start accepts. Automaton has 18914 states and 47774 transitions. Word has length 59 [2021-03-10 21:18:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:47,546 INFO L480 AbstractCegarLoop]: Abstraction has 18914 states and 47774 transitions. [2021-03-10 21:18:47,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 18914 states and 47774 transitions. [2021-03-10 21:18:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:47,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:47,556 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:47,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1107,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:47,756 INFO L428 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:47,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2102925195, now seen corresponding path program 310 times [2021-03-10 21:18:47,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:47,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044348508] [2021-03-10 21:18:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:47,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044348508] [2021-03-10 21:18:47,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629363294] [2021-03-10 21:18:47,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:47,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:47,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:47,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:48,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:48,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-03-10 21:18:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557060998] [2021-03-10 21:18:48,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:48,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:48,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:48,249 INFO L87 Difference]: Start difference. First operand 18914 states and 47774 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:49,155 INFO L93 Difference]: Finished difference Result 18990 states and 47893 transitions. [2021-03-10 21:18:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:18:49,156 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:49,176 INFO L225 Difference]: With dead ends: 18990 [2021-03-10 21:18:49,176 INFO L226 Difference]: Without dead ends: 18952 [2021-03-10 21:18:49,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:18:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18952 states. [2021-03-10 21:18:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18952 to 18905. [2021-03-10 21:18:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18905 states, 18904 states have (on average 2.5257617435463393) internal successors, (47747), 18904 states have internal predecessors, (47747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18905 states to 18905 states and 47747 transitions. [2021-03-10 21:18:49,378 INFO L78 Accepts]: Start accepts. Automaton has 18905 states and 47747 transitions. Word has length 59 [2021-03-10 21:18:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:49,378 INFO L480 AbstractCegarLoop]: Abstraction has 18905 states and 47747 transitions. [2021-03-10 21:18:49,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 18905 states and 47747 transitions. [2021-03-10 21:18:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:49,389 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:49,389 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:49,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-03-10 21:18:49,589 INFO L428 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:49,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:49,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1410554398, now seen corresponding path program 170 times [2021-03-10 21:18:49,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:49,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117297521] [2021-03-10 21:18:49,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 67 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:49,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117297521] [2021-03-10 21:18:49,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280455842] [2021-03-10 21:18:49,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:49,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:49,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:49,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:49,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:49,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:49,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-03-10 21:18:49,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309456058] [2021-03-10 21:18:49,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:18:49,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:49,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:18:49,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:18:49,952 INFO L87 Difference]: Start difference. First operand 18905 states and 47747 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:50,410 INFO L93 Difference]: Finished difference Result 21519 states and 52819 transitions. [2021-03-10 21:18:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:18:50,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:50,434 INFO L225 Difference]: With dead ends: 21519 [2021-03-10 21:18:50,434 INFO L226 Difference]: Without dead ends: 21491 [2021-03-10 21:18:50,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:18:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21491 states. [2021-03-10 21:18:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21491 to 18812. [2021-03-10 21:18:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18812 states, 18811 states have (on average 2.528361065334113) internal successors, (47561), 18811 states have internal predecessors, (47561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18812 states to 18812 states and 47561 transitions. [2021-03-10 21:18:50,653 INFO L78 Accepts]: Start accepts. Automaton has 18812 states and 47561 transitions. Word has length 59 [2021-03-10 21:18:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:50,654 INFO L480 AbstractCegarLoop]: Abstraction has 18812 states and 47561 transitions. [2021-03-10 21:18:50,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 18812 states and 47561 transitions. [2021-03-10 21:18:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:50,663 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:50,663 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:50,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:50,863 INFO L428 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:50,864 INFO L82 PathProgramCache]: Analyzing trace with hash -257205609, now seen corresponding path program 171 times [2021-03-10 21:18:50,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:50,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087956476] [2021-03-10 21:18:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:51,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087956476] [2021-03-10 21:18:51,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949724983] [2021-03-10 21:18:51,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:51,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:18:51,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:51,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:51,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:51,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:51,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:18:51,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294077180] [2021-03-10 21:18:51,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:18:51,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:51,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:18:51,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:18:51,240 INFO L87 Difference]: Start difference. First operand 18812 states and 47561 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:52,285 INFO L93 Difference]: Finished difference Result 20258 states and 50658 transitions. [2021-03-10 21:18:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:18:52,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:52,308 INFO L225 Difference]: With dead ends: 20258 [2021-03-10 21:18:52,308 INFO L226 Difference]: Without dead ends: 20254 [2021-03-10 21:18:52,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:18:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20254 states. [2021-03-10 21:18:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20254 to 18830. [2021-03-10 21:18:52,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18830 states, 18829 states have (on average 2.528387062509958) internal successors, (47607), 18829 states have internal predecessors, (47607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18830 states to 18830 states and 47607 transitions. [2021-03-10 21:18:52,540 INFO L78 Accepts]: Start accepts. Automaton has 18830 states and 47607 transitions. Word has length 59 [2021-03-10 21:18:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:52,540 INFO L480 AbstractCegarLoop]: Abstraction has 18830 states and 47607 transitions. [2021-03-10 21:18:52,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 18830 states and 47607 transitions. [2021-03-10 21:18:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:52,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:52,551 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:52,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:52,751 INFO L428 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1890501993, now seen corresponding path program 311 times [2021-03-10 21:18:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:52,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677197749] [2021-03-10 21:18:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:52,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677197749] [2021-03-10 21:18:52,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11996885] [2021-03-10 21:18:52,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:52,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:18:52,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:52,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:52,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:53,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:53,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 21:18:53,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004147954] [2021-03-10 21:18:53,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:53,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:53,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:53,182 INFO L87 Difference]: Start difference. First operand 18830 states and 47607 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:53,872 INFO L93 Difference]: Finished difference Result 18870 states and 47667 transitions. [2021-03-10 21:18:53,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:18:53,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:53,894 INFO L225 Difference]: With dead ends: 18870 [2021-03-10 21:18:53,894 INFO L226 Difference]: Without dead ends: 18847 [2021-03-10 21:18:53,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18847 states. [2021-03-10 21:18:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18847 to 18821. [2021-03-10 21:18:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18821 states, 18820 states have (on average 2.5283740701381507) internal successors, (47584), 18820 states have internal predecessors, (47584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18821 states to 18821 states and 47584 transitions. [2021-03-10 21:18:54,138 INFO L78 Accepts]: Start accepts. Automaton has 18821 states and 47584 transitions. Word has length 59 [2021-03-10 21:18:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:54,138 INFO L480 AbstractCegarLoop]: Abstraction has 18821 states and 47584 transitions. [2021-03-10 21:18:54,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 18821 states and 47584 transitions. [2021-03-10 21:18:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:54,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:54,149 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:54,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1115 [2021-03-10 21:18:54,349 INFO L428 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1773088706, now seen corresponding path program 312 times [2021-03-10 21:18:54,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:54,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825856780] [2021-03-10 21:18:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 78 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:54,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825856780] [2021-03-10 21:18:54,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344548214] [2021-03-10 21:18:54,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:54,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 21:18:54,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:54,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:54,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 78 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:54,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:54,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:18:54,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979183097] [2021-03-10 21:18:54,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:18:54,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:54,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:18:54,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:18:54,688 INFO L87 Difference]: Start difference. First operand 18821 states and 47584 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:55,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:55,011 INFO L93 Difference]: Finished difference Result 25820 states and 63287 transitions. [2021-03-10 21:18:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:18:55,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:55,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:55,044 INFO L225 Difference]: With dead ends: 25820 [2021-03-10 21:18:55,044 INFO L226 Difference]: Without dead ends: 25820 [2021-03-10 21:18:55,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:18:55,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25820 states. [2021-03-10 21:18:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25820 to 19992. [2021-03-10 21:18:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19992 states, 19991 states have (on average 2.5490970936921613) internal successors, (50959), 19991 states have internal predecessors, (50959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19992 states to 19992 states and 50959 transitions. [2021-03-10 21:18:55,318 INFO L78 Accepts]: Start accepts. Automaton has 19992 states and 50959 transitions. Word has length 59 [2021-03-10 21:18:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:55,318 INFO L480 AbstractCegarLoop]: Abstraction has 19992 states and 50959 transitions. [2021-03-10 21:18:55,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 19992 states and 50959 transitions. [2021-03-10 21:18:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:55,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:55,329 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:55,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-03-10 21:18:55,529 INFO L428 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:55,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:55,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1535027189, now seen corresponding path program 172 times [2021-03-10 21:18:55,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:55,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459408262] [2021-03-10 21:18:55,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:55,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459408262] [2021-03-10 21:18:55,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147758813] [2021-03-10 21:18:55,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:55,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:55,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:55,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:18:55,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:55,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:55,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:18:55,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640824011] [2021-03-10 21:18:55,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:18:55,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:55,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:18:55,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:18:55,887 INFO L87 Difference]: Start difference. First operand 19992 states and 50959 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:56,911 INFO L93 Difference]: Finished difference Result 23893 states and 59039 transitions. [2021-03-10 21:18:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:18:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:56,937 INFO L225 Difference]: With dead ends: 23893 [2021-03-10 21:18:56,937 INFO L226 Difference]: Without dead ends: 23852 [2021-03-10 21:18:56,938 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:18:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23852 states. [2021-03-10 21:18:57,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23852 to 21637. [2021-03-10 21:18:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21637 states, 21636 states have (on average 2.5199667221297837) internal successors, (54522), 21636 states have internal predecessors, (54522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21637 states to 21637 states and 54522 transitions. [2021-03-10 21:18:57,202 INFO L78 Accepts]: Start accepts. Automaton has 21637 states and 54522 transitions. Word has length 59 [2021-03-10 21:18:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:57,202 INFO L480 AbstractCegarLoop]: Abstraction has 21637 states and 54522 transitions. [2021-03-10 21:18:57,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 21637 states and 54522 transitions. [2021-03-10 21:18:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:57,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:57,215 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:57,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1117 [2021-03-10 21:18:57,416 INFO L428 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:57,416 INFO L82 PathProgramCache]: Analyzing trace with hash -18669668, now seen corresponding path program 313 times [2021-03-10 21:18:57,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:57,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641940108] [2021-03-10 21:18:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:57,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641940108] [2021-03-10 21:18:57,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187161651] [2021-03-10 21:18:57,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:18:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:57,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:57,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:18:57,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486985274] [2021-03-10 21:18:57,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:18:57,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:57,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:18:57,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:18:57,736 INFO L87 Difference]: Start difference. First operand 21637 states and 54522 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:58,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:58,050 INFO L93 Difference]: Finished difference Result 26762 states and 65298 transitions. [2021-03-10 21:18:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:18:58,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:58,084 INFO L225 Difference]: With dead ends: 26762 [2021-03-10 21:18:58,084 INFO L226 Difference]: Without dead ends: 26759 [2021-03-10 21:18:58,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:18:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26759 states. [2021-03-10 21:18:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26759 to 21636. [2021-03-10 21:18:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21636 states, 21635 states have (on average 2.519759648717356) internal successors, (54515), 21635 states have internal predecessors, (54515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21636 states to 21636 states and 54515 transitions. [2021-03-10 21:18:58,376 INFO L78 Accepts]: Start accepts. Automaton has 21636 states and 54515 transitions. Word has length 59 [2021-03-10 21:18:58,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:58,376 INFO L480 AbstractCegarLoop]: Abstraction has 21636 states and 54515 transitions. [2021-03-10 21:18:58,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 21636 states and 54515 transitions. [2021-03-10 21:18:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:58,389 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:58,389 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:58,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1118,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:58,589 INFO L428 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:58,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:58,589 INFO L82 PathProgramCache]: Analyzing trace with hash 188392898, now seen corresponding path program 314 times [2021-03-10 21:18:58,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:58,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296054185] [2021-03-10 21:18:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:18:58,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296054185] [2021-03-10 21:18:58,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057915752] [2021-03-10 21:18:58,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:58,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:58,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:18:58,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:18:59,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:59,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 21:18:59,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899438771] [2021-03-10 21:18:59,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:59,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:59,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:59,049 INFO L87 Difference]: Start difference. First operand 21636 states and 54515 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:59,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:59,382 INFO L93 Difference]: Finished difference Result 26248 states and 64473 transitions. [2021-03-10 21:18:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:18:59,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:18:59,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:59,413 INFO L225 Difference]: With dead ends: 26248 [2021-03-10 21:18:59,413 INFO L226 Difference]: Without dead ends: 26236 [2021-03-10 21:18:59,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26236 states. [2021-03-10 21:18:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26236 to 21636. [2021-03-10 21:18:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21636 states, 21635 states have (on average 2.5194823203143053) internal successors, (54509), 21635 states have internal predecessors, (54509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21636 states to 21636 states and 54509 transitions. [2021-03-10 21:18:59,704 INFO L78 Accepts]: Start accepts. Automaton has 21636 states and 54509 transitions. Word has length 59 [2021-03-10 21:18:59,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:59,704 INFO L480 AbstractCegarLoop]: Abstraction has 21636 states and 54509 transitions. [2021-03-10 21:18:59,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 21636 states and 54509 transitions. [2021-03-10 21:18:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:18:59,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:59,717 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:59,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:59,918 INFO L428 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:59,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:59,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1259607115, now seen corresponding path program 315 times [2021-03-10 21:18:59,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:59,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739692021] [2021-03-10 21:18:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 19 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:19:00,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739692021] [2021-03-10 21:19:00,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992061813] [2021-03-10 21:19:00,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:00,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:19:00,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:19:00,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:19:00,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:00,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:19:00,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340862739] [2021-03-10 21:19:00,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:19:00,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:00,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:19:00,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:19:00,299 INFO L87 Difference]: Start difference. First operand 21636 states and 54509 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:01,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:01,599 INFO L93 Difference]: Finished difference Result 22946 states and 56933 transitions. [2021-03-10 21:19:01,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:19:01,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:01,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:01,625 INFO L225 Difference]: With dead ends: 22946 [2021-03-10 21:19:01,625 INFO L226 Difference]: Without dead ends: 22787 [2021-03-10 21:19:01,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:19:01,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22787 states. [2021-03-10 21:19:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22787 to 21114. [2021-03-10 21:19:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21114 states, 21113 states have (on average 2.5209586510680624) internal successors, (53225), 21113 states have internal predecessors, (53225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21114 states to 21114 states and 53225 transitions. [2021-03-10 21:19:01,890 INFO L78 Accepts]: Start accepts. Automaton has 21114 states and 53225 transitions. Word has length 59 [2021-03-10 21:19:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:01,890 INFO L480 AbstractCegarLoop]: Abstraction has 21114 states and 53225 transitions. [2021-03-10 21:19:01,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 21114 states and 53225 transitions. [2021-03-10 21:19:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:01,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:01,904 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:02,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-03-10 21:19:02,104 INFO L428 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:02,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2030442782, now seen corresponding path program 173 times [2021-03-10 21:19:02,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:02,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330333763] [2021-03-10 21:19:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 93 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:02,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330333763] [2021-03-10 21:19:02,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775453843] [2021-03-10 21:19:02,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:02,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:19:02,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:02,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:19:02,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:02,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:02,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2021-03-10 21:19:02,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603847836] [2021-03-10 21:19:02,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:19:02,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:02,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:19:02,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:19:02,540 INFO L87 Difference]: Start difference. First operand 21114 states and 53225 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:03,123 INFO L93 Difference]: Finished difference Result 24246 states and 59691 transitions. [2021-03-10 21:19:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:19:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:03,153 INFO L225 Difference]: With dead ends: 24246 [2021-03-10 21:19:03,153 INFO L226 Difference]: Without dead ends: 24236 [2021-03-10 21:19:03,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:19:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24236 states. [2021-03-10 21:19:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24236 to 21716. [2021-03-10 21:19:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21716 states, 21715 states have (on average 2.5222657149435874) internal successors, (54771), 21715 states have internal predecessors, (54771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21716 states to 21716 states and 54771 transitions. [2021-03-10 21:19:03,431 INFO L78 Accepts]: Start accepts. Automaton has 21716 states and 54771 transitions. Word has length 59 [2021-03-10 21:19:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:03,431 INFO L480 AbstractCegarLoop]: Abstraction has 21716 states and 54771 transitions. [2021-03-10 21:19:03,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 21716 states and 54771 transitions. [2021-03-10 21:19:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:03,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:03,445 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:03,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-03-10 21:19:03,645 INFO L428 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1801333148, now seen corresponding path program 316 times [2021-03-10 21:19:03,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:03,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240196175] [2021-03-10 21:19:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:03,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240196175] [2021-03-10 21:19:03,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590181345] [2021-03-10 21:19:03,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:03,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:19:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:03,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:03,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:19:03,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255767439] [2021-03-10 21:19:04,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:19:04,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:04,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:19:04,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:19:04,000 INFO L87 Difference]: Start difference. First operand 21716 states and 54771 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:04,373 INFO L93 Difference]: Finished difference Result 26321 states and 64682 transitions. [2021-03-10 21:19:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:19:04,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:04,407 INFO L225 Difference]: With dead ends: 26321 [2021-03-10 21:19:04,407 INFO L226 Difference]: Without dead ends: 26303 [2021-03-10 21:19:04,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:19:04,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26303 states. [2021-03-10 21:19:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26303 to 21860. [2021-03-10 21:19:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21860 states, 21859 states have (on average 2.5262363328606066) internal successors, (55221), 21859 states have internal predecessors, (55221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21860 states to 21860 states and 55221 transitions. [2021-03-10 21:19:04,748 INFO L78 Accepts]: Start accepts. Automaton has 21860 states and 55221 transitions. Word has length 59 [2021-03-10 21:19:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:04,748 INFO L480 AbstractCegarLoop]: Abstraction has 21860 states and 55221 transitions. [2021-03-10 21:19:04,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21860 states and 55221 transitions. [2021-03-10 21:19:04,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:04,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:04,763 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:04,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1127 [2021-03-10 21:19:04,963 INFO L428 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:04,963 INFO L82 PathProgramCache]: Analyzing trace with hash 810213250, now seen corresponding path program 317 times [2021-03-10 21:19:04,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:04,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192705823] [2021-03-10 21:19:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:05,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192705823] [2021-03-10 21:19:05,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858384784] [2021-03-10 21:19:05,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:05,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:19:05,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:05,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:19:05,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:05,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:05,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-03-10 21:19:05,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024049463] [2021-03-10 21:19:05,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:19:05,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:05,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:19:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:19:05,387 INFO L87 Difference]: Start difference. First operand 21860 states and 55221 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:05,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:05,796 INFO L93 Difference]: Finished difference Result 26553 states and 65152 transitions. [2021-03-10 21:19:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:19:05,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:05,826 INFO L225 Difference]: With dead ends: 26553 [2021-03-10 21:19:05,826 INFO L226 Difference]: Without dead ends: 26526 [2021-03-10 21:19:05,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:19:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26526 states. [2021-03-10 21:19:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26526 to 21860. [2021-03-10 21:19:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21860 states, 21859 states have (on average 2.5260990896198363) internal successors, (55218), 21859 states have internal predecessors, (55218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21860 states to 21860 states and 55218 transitions. [2021-03-10 21:19:06,119 INFO L78 Accepts]: Start accepts. Automaton has 21860 states and 55218 transitions. Word has length 59 [2021-03-10 21:19:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:06,119 INFO L480 AbstractCegarLoop]: Abstraction has 21860 states and 55218 transitions. [2021-03-10 21:19:06,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 21860 states and 55218 transitions. [2021-03-10 21:19:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:06,131 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:06,131 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:06,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:06,332 INFO L428 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2037475364, now seen corresponding path program 318 times [2021-03-10 21:19:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:06,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738867757] [2021-03-10 21:19:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:06,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738867757] [2021-03-10 21:19:06,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079363618] [2021-03-10 21:19:06,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:06,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 21:19:06,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:06,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:19:06,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:06,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:06,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 21:19:06,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327642578] [2021-03-10 21:19:06,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:19:06,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:06,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:19:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:19:06,732 INFO L87 Difference]: Start difference. First operand 21860 states and 55218 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:07,136 INFO L93 Difference]: Finished difference Result 26492 states and 64981 transitions. [2021-03-10 21:19:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:19:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:07,170 INFO L225 Difference]: With dead ends: 26492 [2021-03-10 21:19:07,170 INFO L226 Difference]: Without dead ends: 26456 [2021-03-10 21:19:07,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:19:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26456 states. [2021-03-10 21:19:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26456 to 21860. [2021-03-10 21:19:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21860 states, 21859 states have (on average 2.5259618463790656) internal successors, (55215), 21859 states have internal predecessors, (55215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21860 states to 21860 states and 55215 transitions. [2021-03-10 21:19:07,473 INFO L78 Accepts]: Start accepts. Automaton has 21860 states and 55215 transitions. Word has length 59 [2021-03-10 21:19:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:07,473 INFO L480 AbstractCegarLoop]: Abstraction has 21860 states and 55215 transitions. [2021-03-10 21:19:07,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 21860 states and 55215 transitions. [2021-03-10 21:19:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:07,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:07,486 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:07,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1136,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:07,687 INFO L428 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash 960022850, now seen corresponding path program 319 times [2021-03-10 21:19:07,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:07,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158877482] [2021-03-10 21:19:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:07,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158877482] [2021-03-10 21:19:07,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400001645] [2021-03-10 21:19:07,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:07,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:19:07,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:08,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:08,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 21:19:08,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43224041] [2021-03-10 21:19:08,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:08,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:08,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:08,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:08,111 INFO L87 Difference]: Start difference. First operand 21860 states and 55215 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:08,563 INFO L93 Difference]: Finished difference Result 26669 states and 65301 transitions. [2021-03-10 21:19:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:19:08,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:08,598 INFO L225 Difference]: With dead ends: 26669 [2021-03-10 21:19:08,598 INFO L226 Difference]: Without dead ends: 26624 [2021-03-10 21:19:08,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:19:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26624 states. [2021-03-10 21:19:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26624 to 21860. [2021-03-10 21:19:08,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21860 states, 21859 states have (on average 2.5258246031382954) internal successors, (55212), 21859 states have internal predecessors, (55212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21860 states to 21860 states and 55212 transitions. [2021-03-10 21:19:08,993 INFO L78 Accepts]: Start accepts. Automaton has 21860 states and 55212 transitions. Word has length 59 [2021-03-10 21:19:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:08,993 INFO L480 AbstractCegarLoop]: Abstraction has 21860 states and 55212 transitions. [2021-03-10 21:19:08,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 21860 states and 55212 transitions. [2021-03-10 21:19:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:09,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:09,005 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:09,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:09,205 INFO L428 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:09,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:09,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1530702308, now seen corresponding path program 320 times [2021-03-10 21:19:09,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:09,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214635026] [2021-03-10 21:19:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:09,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214635026] [2021-03-10 21:19:09,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549683807] [2021-03-10 21:19:09,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:09,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:19:09,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:19:09,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:09,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:09,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-03-10 21:19:09,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764598560] [2021-03-10 21:19:09,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:19:09,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:09,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:19:09,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:19:09,648 INFO L87 Difference]: Start difference. First operand 21860 states and 55212 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:10,180 INFO L93 Difference]: Finished difference Result 26957 states and 65824 transitions. [2021-03-10 21:19:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:19:10,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:10,218 INFO L225 Difference]: With dead ends: 26957 [2021-03-10 21:19:10,218 INFO L226 Difference]: Without dead ends: 26903 [2021-03-10 21:19:10,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:19:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26903 states. [2021-03-10 21:19:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26903 to 21860. [2021-03-10 21:19:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21860 states, 21859 states have (on average 2.525687359897525) internal successors, (55209), 21859 states have internal predecessors, (55209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21860 states to 21860 states and 55209 transitions. [2021-03-10 21:19:10,529 INFO L78 Accepts]: Start accepts. Automaton has 21860 states and 55209 transitions. Word has length 59 [2021-03-10 21:19:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:10,529 INFO L480 AbstractCegarLoop]: Abstraction has 21860 states and 55209 transitions. [2021-03-10 21:19:10,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21860 states and 55209 transitions. [2021-03-10 21:19:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:10,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:10,543 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:10,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1149,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:10,743 INFO L428 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:10,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:10,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1426088706, now seen corresponding path program 321 times [2021-03-10 21:19:10,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:10,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332676500] [2021-03-10 21:19:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:10,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332676500] [2021-03-10 21:19:10,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657200582] [2021-03-10 21:19:10,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:11,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:19:11,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:19:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:11,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:11,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-03-10 21:19:11,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524235294] [2021-03-10 21:19:11,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:19:11,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:11,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:19:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:19:11,205 INFO L87 Difference]: Start difference. First operand 21860 states and 55209 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:11,811 INFO L93 Difference]: Finished difference Result 27419 states and 66664 transitions. [2021-03-10 21:19:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:19:11,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:11,843 INFO L225 Difference]: With dead ends: 27419 [2021-03-10 21:19:11,843 INFO L226 Difference]: Without dead ends: 27356 [2021-03-10 21:19:11,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:19:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27356 states. [2021-03-10 21:19:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27356 to 21860. [2021-03-10 21:19:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21860 states, 21859 states have (on average 2.5255501166567544) internal successors, (55206), 21859 states have internal predecessors, (55206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21860 states to 21860 states and 55206 transitions. [2021-03-10 21:19:12,130 INFO L78 Accepts]: Start accepts. Automaton has 21860 states and 55206 transitions. Word has length 59 [2021-03-10 21:19:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:12,130 INFO L480 AbstractCegarLoop]: Abstraction has 21860 states and 55206 transitions. [2021-03-10 21:19:12,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 21860 states and 55206 transitions. [2021-03-10 21:19:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:12,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:12,142 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:12,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1157 [2021-03-10 21:19:12,343 INFO L428 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:12,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2030174377, now seen corresponding path program 322 times [2021-03-10 21:19:12,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:12,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977406649] [2021-03-10 21:19:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:12,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977406649] [2021-03-10 21:19:12,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133854610] [2021-03-10 21:19:12,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:12,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:12,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:19:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:13,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 21:19:13,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-03-10 21:19:13,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:19:13,087 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-03-10 21:19:13,087 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-03-10 21:19:13,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:19:13,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-03-10 21:19:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:13,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:13,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-03-10 21:19:13,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484346043] [2021-03-10 21:19:13,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:19:13,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:13,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:19:13,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:19:13,106 INFO L87 Difference]: Start difference. First operand 21860 states and 55206 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:26,385 INFO L93 Difference]: Finished difference Result 59627 states and 137746 transitions. [2021-03-10 21:19:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 297 states. [2021-03-10 21:19:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:26,457 INFO L225 Difference]: With dead ends: 59627 [2021-03-10 21:19:26,457 INFO L226 Difference]: Without dead ends: 57624 [2021-03-10 21:19:26,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44283 ImplicationChecksByTransitivity, 10024.3ms TimeCoverageRelationStatistics Valid=6211, Invalid=93329, Unknown=0, NotChecked=0, Total=99540 [2021-03-10 21:19:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57624 states. [2021-03-10 21:19:26,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57624 to 29484. [2021-03-10 21:19:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29484 states, 29483 states have (on average 2.525896279211749) internal successors, (74471), 29483 states have internal predecessors, (74471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29484 states to 29484 states and 74471 transitions. [2021-03-10 21:19:26,944 INFO L78 Accepts]: Start accepts. Automaton has 29484 states and 74471 transitions. Word has length 59 [2021-03-10 21:19:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:26,944 INFO L480 AbstractCegarLoop]: Abstraction has 29484 states and 74471 transitions. [2021-03-10 21:19:26,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 29484 states and 74471 transitions. [2021-03-10 21:19:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:26,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:26,955 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:27,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-03-10 21:19:27,155 INFO L428 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:27,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1404850992, now seen corresponding path program 174 times [2021-03-10 21:19:27,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:27,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896835701] [2021-03-10 21:19:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:27,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896835701] [2021-03-10 21:19:27,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753131628] [2021-03-10 21:19:27,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:27,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 21:19:27,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:27,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:19:27,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:27,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:27,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-03-10 21:19:27,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357242521] [2021-03-10 21:19:27,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:19:27,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:27,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:19:27,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:19:27,524 INFO L87 Difference]: Start difference. First operand 29484 states and 74471 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:28,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:28,101 INFO L93 Difference]: Finished difference Result 42345 states and 103563 transitions. [2021-03-10 21:19:28,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:19:28,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:28,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:28,156 INFO L225 Difference]: With dead ends: 42345 [2021-03-10 21:19:28,156 INFO L226 Difference]: Without dead ends: 42345 [2021-03-10 21:19:28,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:19:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42345 states. [2021-03-10 21:19:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42345 to 29880. [2021-03-10 21:19:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29880 states, 29879 states have (on average 2.5262893671140265) internal successors, (75483), 29879 states have internal predecessors, (75483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29880 states to 29880 states and 75483 transitions. [2021-03-10 21:19:28,577 INFO L78 Accepts]: Start accepts. Automaton has 29880 states and 75483 transitions. Word has length 59 [2021-03-10 21:19:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:28,577 INFO L480 AbstractCegarLoop]: Abstraction has 29880 states and 75483 transitions. [2021-03-10 21:19:28,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:28,577 INFO L276 IsEmpty]: Start isEmpty. Operand 29880 states and 75483 transitions. [2021-03-10 21:19:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:28,587 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:28,587 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:28,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1167 [2021-03-10 21:19:28,788 INFO L428 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:28,788 INFO L82 PathProgramCache]: Analyzing trace with hash -232721464, now seen corresponding path program 175 times [2021-03-10 21:19:28,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:28,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586038759] [2021-03-10 21:19:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:28,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586038759] [2021-03-10 21:19:28,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222402864] [2021-03-10 21:19:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:28,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:19:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:29,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:29,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-03-10 21:19:29,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373607795] [2021-03-10 21:19:29,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:29,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:29,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:29,240 INFO L87 Difference]: Start difference. First operand 29880 states and 75483 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:30,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:30,313 INFO L93 Difference]: Finished difference Result 35678 states and 87639 transitions. [2021-03-10 21:19:30,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:19:30,314 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:30,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:30,354 INFO L225 Difference]: With dead ends: 35678 [2021-03-10 21:19:30,354 INFO L226 Difference]: Without dead ends: 35678 [2021-03-10 21:19:30,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 569.9ms TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:19:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35678 states. [2021-03-10 21:19:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35678 to 26274. [2021-03-10 21:19:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26274 states, 26273 states have (on average 2.5484718151714687) internal successors, (66956), 26273 states have internal predecessors, (66956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26274 states to 26274 states and 66956 transitions. [2021-03-10 21:19:30,809 INFO L78 Accepts]: Start accepts. Automaton has 26274 states and 66956 transitions. Word has length 59 [2021-03-10 21:19:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:30,810 INFO L480 AbstractCegarLoop]: Abstraction has 26274 states and 66956 transitions. [2021-03-10 21:19:30,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 26274 states and 66956 transitions. [2021-03-10 21:19:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 21:19:30,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:30,822 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:31,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-03-10 21:19:31,022 INFO L428 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:31,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1702913116, now seen corresponding path program 323 times [2021-03-10 21:19:31,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:31,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064078831] [2021-03-10 21:19:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:31,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064078831] [2021-03-10 21:19:31,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790941856] [2021-03-10 21:19:31,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:31,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:19:31,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:31,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:19:31,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:31,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:31,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 21 [2021-03-10 21:19:31,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134848688] [2021-03-10 21:19:31,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:19:31,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:31,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:19:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:19:31,635 INFO L87 Difference]: Start difference. First operand 26274 states and 66956 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:32,584 INFO L93 Difference]: Finished difference Result 30144 states and 75274 transitions. [2021-03-10 21:19:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:19:32,586 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 21:19:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:32,620 INFO L225 Difference]: With dead ends: 30144 [2021-03-10 21:19:32,621 INFO L226 Difference]: Without dead ends: 30070 [2021-03-10 21:19:32,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=236, Invalid=634, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:19:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-03-10 21:19:32,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 26283. [2021-03-10 21:19:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26283 states, 26282 states have (on average 2.548131801232783) internal successors, (66970), 26282 states have internal predecessors, (66970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26283 states to 26283 states and 66970 transitions. [2021-03-10 21:19:32,979 INFO L78 Accepts]: Start accepts. Automaton has 26283 states and 66970 transitions. Word has length 59 [2021-03-10 21:19:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:32,979 INFO L480 AbstractCegarLoop]: Abstraction has 26283 states and 66970 transitions. [2021-03-10 21:19:32,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 26283 states and 66970 transitions. [2021-03-10 21:19:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:19:32,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:32,992 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:33,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1171,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:33,192 INFO L428 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:33,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1633617221, now seen corresponding path program 324 times [2021-03-10 21:19:33,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:33,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627644762] [2021-03-10 21:19:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:19:33,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627644762] [2021-03-10 21:19:33,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510725479] [2021-03-10 21:19:33,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:33,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-03-10 21:19:33,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:33,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:19:33,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 92 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:34,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:34,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 28 [2021-03-10 21:19:34,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158715475] [2021-03-10 21:19:34,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:19:34,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:34,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:19:34,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:19:34,160 INFO L87 Difference]: Start difference. First operand 26283 states and 66970 transitions. Second operand has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:37,799 INFO L93 Difference]: Finished difference Result 33134 states and 82134 transitions. [2021-03-10 21:19:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 21:19:37,801 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:19:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:37,840 INFO L225 Difference]: With dead ends: 33134 [2021-03-10 21:19:37,841 INFO L226 Difference]: Without dead ends: 33087 [2021-03-10 21:19:37,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1956.6ms TimeCoverageRelationStatistics Valid=971, Invalid=4141, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:19:37,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33087 states. [2021-03-10 21:19:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33087 to 29440. [2021-03-10 21:19:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29440 states, 29439 states have (on average 2.538469377356568) internal successors, (74730), 29439 states have internal predecessors, (74730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29440 states to 29440 states and 74730 transitions. [2021-03-10 21:19:38,329 INFO L78 Accepts]: Start accepts. Automaton has 29440 states and 74730 transitions. Word has length 62 [2021-03-10 21:19:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:38,329 INFO L480 AbstractCegarLoop]: Abstraction has 29440 states and 74730 transitions. [2021-03-10 21:19:38,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 29440 states and 74730 transitions. [2021-03-10 21:19:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:19:38,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:38,345 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:38,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1181 [2021-03-10 21:19:38,545 INFO L428 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2125604839, now seen corresponding path program 325 times [2021-03-10 21:19:38,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:38,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978804641] [2021-03-10 21:19:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:38,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978804641] [2021-03-10 21:19:38,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838236049] [2021-03-10 21:19:38,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:38,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:19:38,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:38,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:38,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:19:38,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376875288] [2021-03-10 21:19:38,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:19:38,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:38,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:19:38,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:19:38,900 INFO L87 Difference]: Start difference. First operand 29440 states and 74730 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:39,814 INFO L93 Difference]: Finished difference Result 31877 states and 79974 transitions. [2021-03-10 21:19:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:19:39,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:19:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:39,853 INFO L225 Difference]: With dead ends: 31877 [2021-03-10 21:19:39,853 INFO L226 Difference]: Without dead ends: 31833 [2021-03-10 21:19:39,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:19:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31833 states. [2021-03-10 21:19:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31833 to 29647. [2021-03-10 21:19:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29647 states, 29646 states have (on average 2.537273156580989) internal successors, (75220), 29646 states have internal predecessors, (75220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29647 states to 29647 states and 75220 transitions. [2021-03-10 21:19:40,268 INFO L78 Accepts]: Start accepts. Automaton has 29647 states and 75220 transitions. Word has length 62 [2021-03-10 21:19:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:40,268 INFO L480 AbstractCegarLoop]: Abstraction has 29647 states and 75220 transitions. [2021-03-10 21:19:40,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 29647 states and 75220 transitions. [2021-03-10 21:19:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:19:40,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:40,285 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:40,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1182,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:40,485 INFO L428 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -598942088, now seen corresponding path program 10 times [2021-03-10 21:19:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:40,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210448037] [2021-03-10 21:19:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 33 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:40,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210448037] [2021-03-10 21:19:40,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379172544] [2021-03-10 21:19:40,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:40,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:40,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:40,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:19:40,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:41,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:41,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-03-10 21:19:41,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983237536] [2021-03-10 21:19:41,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:19:41,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:41,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:19:41,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:19:41,590 INFO L87 Difference]: Start difference. First operand 29647 states and 75220 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:44,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:44,099 INFO L93 Difference]: Finished difference Result 29881 states and 75599 transitions. [2021-03-10 21:19:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:19:44,102 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:19:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:44,142 INFO L225 Difference]: With dead ends: 29881 [2021-03-10 21:19:44,142 INFO L226 Difference]: Without dead ends: 29691 [2021-03-10 21:19:44,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 703.5ms TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:19:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29691 states. [2021-03-10 21:19:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29691 to 29617. [2021-03-10 21:19:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29617 states, 29616 states have (on average 2.5370745542949757) internal successors, (75138), 29616 states have internal predecessors, (75138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29617 states to 29617 states and 75138 transitions. [2021-03-10 21:19:44,525 INFO L78 Accepts]: Start accepts. Automaton has 29617 states and 75138 transitions. Word has length 62 [2021-03-10 21:19:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:44,525 INFO L480 AbstractCegarLoop]: Abstraction has 29617 states and 75138 transitions. [2021-03-10 21:19:44,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 29617 states and 75138 transitions. [2021-03-10 21:19:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:19:44,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:44,541 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:44,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1183 [2021-03-10 21:19:44,741 INFO L428 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash -845583229, now seen corresponding path program 326 times [2021-03-10 21:19:44,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:44,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789447484] [2021-03-10 21:19:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:44,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789447484] [2021-03-10 21:19:44,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63957532] [2021-03-10 21:19:44,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:44,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:19:44,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:44,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:19:44,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 64 proven. 135 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:19:45,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:45,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-03-10 21:19:45,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801158825] [2021-03-10 21:19:45,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:19:45,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:45,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:19:45,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:19:45,390 INFO L87 Difference]: Start difference. First operand 29617 states and 75138 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:47,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:47,876 INFO L93 Difference]: Finished difference Result 40020 states and 97789 transitions. [2021-03-10 21:19:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 21:19:47,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:19:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:47,931 INFO L225 Difference]: With dead ends: 40020 [2021-03-10 21:19:47,931 INFO L226 Difference]: Without dead ends: 39941 [2021-03-10 21:19:47,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1040.4ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:19:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39941 states. [2021-03-10 21:19:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39941 to 30116. [2021-03-10 21:19:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30116 states, 30115 states have (on average 2.534750124522663) internal successors, (76334), 30115 states have internal predecessors, (76334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30116 states to 30116 states and 76334 transitions. [2021-03-10 21:19:48,397 INFO L78 Accepts]: Start accepts. Automaton has 30116 states and 76334 transitions. Word has length 62 [2021-03-10 21:19:48,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:48,398 INFO L480 AbstractCegarLoop]: Abstraction has 30116 states and 76334 transitions. [2021-03-10 21:19:48,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 30116 states and 76334 transitions. [2021-03-10 21:19:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:19:48,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:48,414 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:48,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1184,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:48,615 INFO L428 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:48,615 INFO L82 PathProgramCache]: Analyzing trace with hash -528313753, now seen corresponding path program 327 times [2021-03-10 21:19:48,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:48,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298593938] [2021-03-10 21:19:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:48,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298593938] [2021-03-10 21:19:48,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732433590] [2021-03-10 21:19:48,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:48,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-03-10 21:19:48,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:19:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 51 proven. 148 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:19:49,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:49,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-03-10 21:19:49,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371198803] [2021-03-10 21:19:49,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:19:49,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:49,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:19:49,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:19:49,290 INFO L87 Difference]: Start difference. First operand 30116 states and 76334 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:51,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:51,780 INFO L93 Difference]: Finished difference Result 41111 states and 100141 transitions. [2021-03-10 21:19:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 21:19:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:19:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:51,836 INFO L225 Difference]: With dead ends: 41111 [2021-03-10 21:19:51,836 INFO L226 Difference]: Without dead ends: 41032 [2021-03-10 21:19:51,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 983.8ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:19:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41032 states. [2021-03-10 21:19:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41032 to 30209. [2021-03-10 21:19:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30209 states, 30208 states have (on average 2.5336996822033897) internal successors, (76538), 30208 states have internal predecessors, (76538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30209 states to 30209 states and 76538 transitions. [2021-03-10 21:19:52,308 INFO L78 Accepts]: Start accepts. Automaton has 30209 states and 76538 transitions. Word has length 62 [2021-03-10 21:19:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:52,308 INFO L480 AbstractCegarLoop]: Abstraction has 30209 states and 76538 transitions. [2021-03-10 21:19:52,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 30209 states and 76538 transitions. [2021-03-10 21:19:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:19:52,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:52,325 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:52,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1185,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:52,525 INFO L428 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:52,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1976372733, now seen corresponding path program 328 times [2021-03-10 21:19:52,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:52,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898784524] [2021-03-10 21:19:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898784524] [2021-03-10 21:19:52,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711371817] [2021-03-10 21:19:52,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:52,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:52,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:52,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:19:52,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:52,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:52,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:19:52,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866102577] [2021-03-10 21:19:52,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:19:52,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:52,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:19:52,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:19:52,902 INFO L87 Difference]: Start difference. First operand 30209 states and 76538 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:53,913 INFO L93 Difference]: Finished difference Result 31655 states and 79597 transitions. [2021-03-10 21:19:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:19:53,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:19:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:53,958 INFO L225 Difference]: With dead ends: 31655 [2021-03-10 21:19:53,959 INFO L226 Difference]: Without dead ends: 31608 [2021-03-10 21:19:53,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:19:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31608 states. [2021-03-10 21:19:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31608 to 30305. [2021-03-10 21:19:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30305 states, 30304 states have (on average 2.53220696937698) internal successors, (76736), 30304 states have internal predecessors, (76736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30305 states to 30305 states and 76736 transitions. [2021-03-10 21:19:54,367 INFO L78 Accepts]: Start accepts. Automaton has 30305 states and 76736 transitions. Word has length 62 [2021-03-10 21:19:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:54,367 INFO L480 AbstractCegarLoop]: Abstraction has 30305 states and 76736 transitions. [2021-03-10 21:19:54,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 30305 states and 76736 transitions. [2021-03-10 21:19:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:19:54,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:54,384 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:54,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:54,584 INFO L428 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:54,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:54,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1845042407, now seen corresponding path program 329 times [2021-03-10 21:19:54,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:54,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845394335] [2021-03-10 21:19:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:54,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845394335] [2021-03-10 21:19:54,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864775602] [2021-03-10 21:19:54,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:54,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-03-10 21:19:54,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:54,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:19:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:54,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:54,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:19:54,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553596935] [2021-03-10 21:19:54,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:19:54,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:54,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:19:54,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:19:54,936 INFO L87 Difference]: Start difference. First operand 30305 states and 76736 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:55,931 INFO L93 Difference]: Finished difference Result 31783 states and 79841 transitions. [2021-03-10 21:19:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:19:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:19:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:55,973 INFO L225 Difference]: With dead ends: 31783 [2021-03-10 21:19:55,974 INFO L226 Difference]: Without dead ends: 31740 [2021-03-10 21:19:55,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:19:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31740 states. [2021-03-10 21:19:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31740 to 30422. [2021-03-10 21:19:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30422 states, 30421 states have (on average 2.5302915748989183) internal successors, (76974), 30421 states have internal predecessors, (76974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30422 states to 30422 states and 76974 transitions. [2021-03-10 21:19:56,390 INFO L78 Accepts]: Start accepts. Automaton has 30422 states and 76974 transitions. Word has length 62 [2021-03-10 21:19:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:56,390 INFO L480 AbstractCegarLoop]: Abstraction has 30422 states and 76974 transitions. [2021-03-10 21:19:56,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 30422 states and 76974 transitions. [2021-03-10 21:19:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:19:56,406 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:56,406 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:56,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1187 [2021-03-10 21:19:56,607 INFO L428 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:56,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:56,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1074636925, now seen corresponding path program 330 times [2021-03-10 21:19:56,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:56,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644439842] [2021-03-10 21:19:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:56,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644439842] [2021-03-10 21:19:56,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794411006] [2021-03-10 21:19:56,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:56,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-03-10 21:19:56,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:19:56,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:57,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:57,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:19:57,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431941832] [2021-03-10 21:19:57,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:19:57,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:57,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:19:57,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:19:57,001 INFO L87 Difference]: Start difference. First operand 30422 states and 76974 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:57,981 INFO L93 Difference]: Finished difference Result 31994 states and 80254 transitions. [2021-03-10 21:19:57,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:19:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:19:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:58,026 INFO L225 Difference]: With dead ends: 31994 [2021-03-10 21:19:58,026 INFO L226 Difference]: Without dead ends: 31947 [2021-03-10 21:19:58,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:19:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31947 states. [2021-03-10 21:19:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31947 to 30580. [2021-03-10 21:19:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30580 states, 30579 states have (on average 2.527747800778312) internal successors, (77296), 30579 states have internal predecessors, (77296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30580 states to 30580 states and 77296 transitions. [2021-03-10 21:19:58,538 INFO L78 Accepts]: Start accepts. Automaton has 30580 states and 77296 transitions. Word has length 62 [2021-03-10 21:19:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:58,539 INFO L480 AbstractCegarLoop]: Abstraction has 30580 states and 77296 transitions. [2021-03-10 21:19:58,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 30580 states and 77296 transitions. [2021-03-10 21:19:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:19:58,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:58,554 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:58,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 555 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-03-10 21:19:58,755 INFO L428 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:58,755 INFO L82 PathProgramCache]: Analyzing trace with hash 436062055, now seen corresponding path program 331 times [2021-03-10 21:19:58,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:58,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677193361] [2021-03-10 21:19:58,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:58,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677193361] [2021-03-10 21:19:58,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814641823] [2021-03-10 21:19:58,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:58,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 21:19:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:19:59,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:59,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 21:19:59,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593512132] [2021-03-10 21:19:59,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:19:59,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:19:59,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:19:59,160 INFO L87 Difference]: Start difference. First operand 30580 states and 77296 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:00,091 INFO L93 Difference]: Finished difference Result 32079 states and 80329 transitions. [2021-03-10 21:20:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:20:00,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:20:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:00,133 INFO L225 Difference]: With dead ends: 32079 [2021-03-10 21:20:00,133 INFO L226 Difference]: Without dead ends: 32042 [2021-03-10 21:20:00,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:20:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32042 states. [2021-03-10 21:20:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32042 to 30733. [2021-03-10 21:20:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30733 states, 30732 states have (on average 2.5247624625797216) internal successors, (77591), 30732 states have internal predecessors, (77591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30733 states to 30733 states and 77591 transitions. [2021-03-10 21:20:00,559 INFO L78 Accepts]: Start accepts. Automaton has 30733 states and 77591 transitions. Word has length 62 [2021-03-10 21:20:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:00,559 INFO L480 AbstractCegarLoop]: Abstraction has 30733 states and 77591 transitions. [2021-03-10 21:20:00,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 30733 states and 77591 transitions. [2021-03-10 21:20:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:20:00,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:00,578 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:00,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1189 [2021-03-10 21:20:00,778 INFO L428 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:00,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1550459320, now seen corresponding path program 11 times [2021-03-10 21:20:00,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:00,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391331694] [2021-03-10 21:20:00,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 34 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:20:01,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391331694] [2021-03-10 21:20:01,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590910686] [2021-03-10 21:20:01,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:01,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:20:01,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:20:01,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 160 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:20:01,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:01,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-03-10 21:20:01,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423844653] [2021-03-10 21:20:01,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:20:01,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:01,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:20:01,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:20:01,887 INFO L87 Difference]: Start difference. First operand 30733 states and 77591 transitions. Second operand has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:04,116 INFO L93 Difference]: Finished difference Result 30958 states and 77951 transitions. [2021-03-10 21:20:04,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:20:04,118 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:20:04,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:04,155 INFO L225 Difference]: With dead ends: 30958 [2021-03-10 21:20:04,155 INFO L226 Difference]: Without dead ends: 30792 [2021-03-10 21:20:04,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 721.7ms TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:20:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30792 states. [2021-03-10 21:20:04,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30792 to 30703. [2021-03-10 21:20:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30703 states, 30702 states have (on average 2.5245586606735717) internal successors, (77509), 30702 states have internal predecessors, (77509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30703 states to 30703 states and 77509 transitions. [2021-03-10 21:20:04,533 INFO L78 Accepts]: Start accepts. Automaton has 30703 states and 77509 transitions. Word has length 62 [2021-03-10 21:20:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:04,533 INFO L480 AbstractCegarLoop]: Abstraction has 30703 states and 77509 transitions. [2021-03-10 21:20:04,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.5) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 30703 states and 77509 transitions. [2021-03-10 21:20:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-03-10 21:20:04,553 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:04,553 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:04,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1190,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:04,753 INFO L428 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:04,754 INFO L82 PathProgramCache]: Analyzing trace with hash -149813418, now seen corresponding path program 12 times [2021-03-10 21:20:04,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:04,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126125726] [2021-03-10 21:20:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 34 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:20:05,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126125726] [2021-03-10 21:20:05,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411304002] [2021-03-10 21:20:05,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:05,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 21:20:05,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:05,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 21:20:05,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 31 proven. 160 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:20:05,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:05,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-03-10 21:20:05,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157341268] [2021-03-10 21:20:05,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:20:05,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:05,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:20:05,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:20:05,712 INFO L87 Difference]: Start difference. First operand 30703 states and 77509 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:07,850 INFO L93 Difference]: Finished difference Result 30869 states and 77748 transitions. [2021-03-10 21:20:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:20:07,852 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-03-10 21:20:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:07,888 INFO L225 Difference]: With dead ends: 30869 [2021-03-10 21:20:07,889 INFO L226 Difference]: Without dead ends: 30727 [2021-03-10 21:20:07,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:20:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30727 states. [2021-03-10 21:20:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30727 to 30623. [2021-03-10 21:20:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30623 states, 30622 states have (on average 2.525341257919143) internal successors, (77331), 30622 states have internal predecessors, (77331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30623 states to 30623 states and 77331 transitions. [2021-03-10 21:20:08,290 INFO L78 Accepts]: Start accepts. Automaton has 30623 states and 77331 transitions. Word has length 62 [2021-03-10 21:20:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:08,290 INFO L480 AbstractCegarLoop]: Abstraction has 30623 states and 77331 transitions. [2021-03-10 21:20:08,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 30623 states and 77331 transitions. [2021-03-10 21:20:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:20:08,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:08,309 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:08,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:08,510 INFO L428 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:08,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1959224392, now seen corresponding path program 176 times [2021-03-10 21:20:08,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:08,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167361595] [2021-03-10 21:20:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:08,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167361595] [2021-03-10 21:20:08,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027510459] [2021-03-10 21:20:08,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:08,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:20:08,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:08,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:20:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 93 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:11,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:11,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-03-10 21:20:11,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839186963] [2021-03-10 21:20:11,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-03-10 21:20:11,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:11,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-03-10 21:20:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:20:11,499 INFO L87 Difference]: Start difference. First operand 30623 states and 77331 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:16,216 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-03-10 21:20:17,040 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-03-10 21:21:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:03,391 INFO L93 Difference]: Finished difference Result 70844 states and 167589 transitions. [2021-03-10 21:21:03,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 409 states. [2021-03-10 21:21:03,394 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:03,474 INFO L225 Difference]: With dead ends: 70844 [2021-03-10 21:21:03,474 INFO L226 Difference]: Without dead ends: 69954 [2021-03-10 21:21:03,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80565 ImplicationChecksByTransitivity, 46119.1ms TimeCoverageRelationStatistics Valid=22109, Invalid=166681, Unknown=0, NotChecked=0, Total=188790 [2021-03-10 21:21:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69954 states. [2021-03-10 21:21:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69954 to 36914. [2021-03-10 21:21:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36914 states, 36913 states have (on average 2.5517839243626907) internal successors, (94194), 36913 states have internal predecessors, (94194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36914 states to 36914 states and 94194 transitions. [2021-03-10 21:21:04,158 INFO L78 Accepts]: Start accepts. Automaton has 36914 states and 94194 transitions. Word has length 65 [2021-03-10 21:21:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:04,158 INFO L480 AbstractCegarLoop]: Abstraction has 36914 states and 94194 transitions. [2021-03-10 21:21:04,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 36914 states and 94194 transitions. [2021-03-10 21:21:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:04,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:04,177 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:04,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1192 [2021-03-10 21:21:04,378 INFO L428 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:04,378 INFO L82 PathProgramCache]: Analyzing trace with hash -19045304, now seen corresponding path program 332 times [2021-03-10 21:21:04,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:04,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676333236] [2021-03-10 21:21:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 206 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:04,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676333236] [2021-03-10 21:21:04,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695217996] [2021-03-10 21:21:04,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:04,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:04,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:04,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:21:04,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 208 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:05,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:05,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-03-10 21:21:05,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066034589] [2021-03-10 21:21:05,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:21:05,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:05,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:21:05,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:21:05,951 INFO L87 Difference]: Start difference. First operand 36914 states and 94194 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:10,765 INFO L93 Difference]: Finished difference Result 37551 states and 95321 transitions. [2021-03-10 21:21:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:21:10,767 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:10,812 INFO L225 Difference]: With dead ends: 37551 [2021-03-10 21:21:10,812 INFO L226 Difference]: Without dead ends: 37103 [2021-03-10 21:21:10,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 986.7ms TimeCoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:21:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37103 states. [2021-03-10 21:21:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37103 to 36679. [2021-03-10 21:21:11,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36679 states, 36678 states have (on average 2.5503844266317683) internal successors, (93543), 36678 states have internal predecessors, (93543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36679 states to 36679 states and 93543 transitions. [2021-03-10 21:21:11,301 INFO L78 Accepts]: Start accepts. Automaton has 36679 states and 93543 transitions. Word has length 65 [2021-03-10 21:21:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:11,301 INFO L480 AbstractCegarLoop]: Abstraction has 36679 states and 93543 transitions. [2021-03-10 21:21:11,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 36679 states and 93543 transitions. [2021-03-10 21:21:11,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:11,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:11,322 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:11,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:11,522 INFO L428 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:11,522 INFO L82 PathProgramCache]: Analyzing trace with hash 708589307, now seen corresponding path program 177 times [2021-03-10 21:21:11,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:11,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922613092] [2021-03-10 21:21:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:11,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922613092] [2021-03-10 21:21:11,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308887040] [2021-03-10 21:21:11,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:11,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 21:21:11,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:21:11,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:12,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:12,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:21:12,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682819955] [2021-03-10 21:21:12,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:12,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:12,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:12,166 INFO L87 Difference]: Start difference. First operand 36679 states and 93543 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:12,833 INFO L93 Difference]: Finished difference Result 45437 states and 110404 transitions. [2021-03-10 21:21:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:21:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:12,888 INFO L225 Difference]: With dead ends: 45437 [2021-03-10 21:21:12,888 INFO L226 Difference]: Without dead ends: 45427 [2021-03-10 21:21:12,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:21:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45427 states. [2021-03-10 21:21:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45427 to 36762. [2021-03-10 21:21:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36762 states, 36761 states have (on average 2.5519164331764643) internal successors, (93811), 36761 states have internal predecessors, (93811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36762 states to 36762 states and 93811 transitions. [2021-03-10 21:21:13,415 INFO L78 Accepts]: Start accepts. Automaton has 36762 states and 93811 transitions. Word has length 65 [2021-03-10 21:21:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:13,415 INFO L480 AbstractCegarLoop]: Abstraction has 36762 states and 93811 transitions. [2021-03-10 21:21:13,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 36762 states and 93811 transitions. [2021-03-10 21:21:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:13,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:13,435 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:13,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1206,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:13,635 INFO L428 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:13,636 INFO L82 PathProgramCache]: Analyzing trace with hash -248603333, now seen corresponding path program 178 times [2021-03-10 21:21:13,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:13,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535189487] [2021-03-10 21:21:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:13,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535189487] [2021-03-10 21:21:13,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150629518] [2021-03-10 21:21:13,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:13,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:21:13,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:13,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:21:13,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:14,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:14,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:21:14,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043752200] [2021-03-10 21:21:14,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:14,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:14,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:14,252 INFO L87 Difference]: Start difference. First operand 36762 states and 93811 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:14,961 INFO L93 Difference]: Finished difference Result 49701 states and 121530 transitions. [2021-03-10 21:21:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:21:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:15,024 INFO L225 Difference]: With dead ends: 49701 [2021-03-10 21:21:15,024 INFO L226 Difference]: Without dead ends: 49701 [2021-03-10 21:21:15,025 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:21:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49701 states. [2021-03-10 21:21:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49701 to 38949. [2021-03-10 21:21:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38949 states, 38948 states have (on average 2.575254185067269) internal successors, (100301), 38948 states have internal predecessors, (100301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38949 states to 38949 states and 100301 transitions. [2021-03-10 21:21:15,701 INFO L78 Accepts]: Start accepts. Automaton has 38949 states and 100301 transitions. Word has length 65 [2021-03-10 21:21:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:15,701 INFO L480 AbstractCegarLoop]: Abstraction has 38949 states and 100301 transitions. [2021-03-10 21:21:15,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 38949 states and 100301 transitions. [2021-03-10 21:21:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:15,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:15,722 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:15,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1209 [2021-03-10 21:21:15,922 INFO L428 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:15,922 INFO L82 PathProgramCache]: Analyzing trace with hash -782468709, now seen corresponding path program 333 times [2021-03-10 21:21:15,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:15,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451460646] [2021-03-10 21:21:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:16,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451460646] [2021-03-10 21:21:16,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164541323] [2021-03-10 21:21:16,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:16,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:21:16,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:16,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:21:16,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:16,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:16,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 21:21:16,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091544849] [2021-03-10 21:21:16,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:21:16,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:16,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:21:16,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:21:16,568 INFO L87 Difference]: Start difference. First operand 38949 states and 100301 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:17,084 INFO L93 Difference]: Finished difference Result 41545 states and 105404 transitions. [2021-03-10 21:21:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:21:17,086 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:17,135 INFO L225 Difference]: With dead ends: 41545 [2021-03-10 21:21:17,136 INFO L226 Difference]: Without dead ends: 41539 [2021-03-10 21:21:17,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41539 states. [2021-03-10 21:21:17,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41539 to 38514. [2021-03-10 21:21:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38514 states, 38513 states have (on average 2.569703736400696) internal successors, (98967), 38513 states have internal predecessors, (98967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38514 states to 38514 states and 98967 transitions. [2021-03-10 21:21:17,635 INFO L78 Accepts]: Start accepts. Automaton has 38514 states and 98967 transitions. Word has length 65 [2021-03-10 21:21:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:17,635 INFO L480 AbstractCegarLoop]: Abstraction has 38514 states and 98967 transitions. [2021-03-10 21:21:17,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 38514 states and 98967 transitions. [2021-03-10 21:21:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:17,654 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:17,654 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:17,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-03-10 21:21:17,854 INFO L428 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:17,855 INFO L82 PathProgramCache]: Analyzing trace with hash 855335590, now seen corresponding path program 179 times [2021-03-10 21:21:17,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:17,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469876384] [2021-03-10 21:21:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:21:18,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469876384] [2021-03-10 21:21:18,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368484369] [2021-03-10 21:21:18,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:18,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-03-10 21:21:18,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:21:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:21:18,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:18,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:21:18,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354264377] [2021-03-10 21:21:18,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:21:18,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:18,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:21:18,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:21:18,511 INFO L87 Difference]: Start difference. First operand 38514 states and 98967 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:20,521 INFO L93 Difference]: Finished difference Result 42470 states and 107034 transitions. [2021-03-10 21:21:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:21:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:20,576 INFO L225 Difference]: With dead ends: 42470 [2021-03-10 21:21:20,577 INFO L226 Difference]: Without dead ends: 42403 [2021-03-10 21:21:20,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 470.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:21:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42403 states. [2021-03-10 21:21:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42403 to 39445. [2021-03-10 21:21:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39445 states, 39444 states have (on average 2.5664232836426324) internal successors, (101230), 39444 states have internal predecessors, (101230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39445 states to 39445 states and 101230 transitions. [2021-03-10 21:21:21,219 INFO L78 Accepts]: Start accepts. Automaton has 39445 states and 101230 transitions. Word has length 65 [2021-03-10 21:21:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:21,219 INFO L480 AbstractCegarLoop]: Abstraction has 39445 states and 101230 transitions. [2021-03-10 21:21:21,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 39445 states and 101230 transitions. [2021-03-10 21:21:21,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:21,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:21,239 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:21,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-03-10 21:21:21,439 INFO L428 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash -698361267, now seen corresponding path program 334 times [2021-03-10 21:21:21,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:21,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195475549] [2021-03-10 21:21:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:21:21,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195475549] [2021-03-10 21:21:21,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873593580] [2021-03-10 21:21:21,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:21,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:21:21,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:21,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:21:21,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:21:22,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:22,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 21:21:22,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394952326] [2021-03-10 21:21:22,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:21:22,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:22,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:21:22,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:21:22,016 INFO L87 Difference]: Start difference. First operand 39445 states and 101230 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:22,709 INFO L93 Difference]: Finished difference Result 43543 states and 109077 transitions. [2021-03-10 21:21:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:21:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:22,765 INFO L225 Difference]: With dead ends: 43543 [2021-03-10 21:21:22,766 INFO L226 Difference]: Without dead ends: 43540 [2021-03-10 21:21:22,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:21:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43540 states. [2021-03-10 21:21:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43540 to 39407. [2021-03-10 21:21:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39407 states, 39406 states have (on average 2.565472263107141) internal successors, (101095), 39406 states have internal predecessors, (101095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39407 states to 39407 states and 101095 transitions. [2021-03-10 21:21:23,309 INFO L78 Accepts]: Start accepts. Automaton has 39407 states and 101095 transitions. Word has length 65 [2021-03-10 21:21:23,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:23,309 INFO L480 AbstractCegarLoop]: Abstraction has 39407 states and 101095 transitions. [2021-03-10 21:21:23,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 39407 states and 101095 transitions. [2021-03-10 21:21:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:23,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:23,329 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:23,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:23,530 INFO L428 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:23,530 INFO L82 PathProgramCache]: Analyzing trace with hash -491298701, now seen corresponding path program 335 times [2021-03-10 21:21:23,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:23,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337667479] [2021-03-10 21:21:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:21:23,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337667479] [2021-03-10 21:21:23,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708665349] [2021-03-10 21:21:23,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:23,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 21:21:23,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:23,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:21:23,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 106 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:24,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:24,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2021-03-10 21:21:24,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320305523] [2021-03-10 21:21:24,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:21:24,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:24,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:21:24,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:21:24,253 INFO L87 Difference]: Start difference. First operand 39407 states and 101095 transitions. Second operand has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:25,292 INFO L93 Difference]: Finished difference Result 43943 states and 109870 transitions. [2021-03-10 21:21:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:21:25,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:25,345 INFO L225 Difference]: With dead ends: 43943 [2021-03-10 21:21:25,345 INFO L226 Difference]: Without dead ends: 43925 [2021-03-10 21:21:25,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:21:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43925 states. [2021-03-10 21:21:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43925 to 40076. [2021-03-10 21:21:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40076 states, 40075 states have (on average 2.5624204616344355) internal successors, (102689), 40075 states have internal predecessors, (102689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40076 states to 40076 states and 102689 transitions. [2021-03-10 21:21:25,989 INFO L78 Accepts]: Start accepts. Automaton has 40076 states and 102689 transitions. Word has length 65 [2021-03-10 21:21:25,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:25,990 INFO L480 AbstractCegarLoop]: Abstraction has 40076 states and 102689 transitions. [2021-03-10 21:21:25,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 40076 states and 102689 transitions. [2021-03-10 21:21:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:26,011 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:26,011 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:26,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-03-10 21:21:26,212 INFO L428 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:26,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:26,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1939298714, now seen corresponding path program 336 times [2021-03-10 21:21:26,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:26,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535550319] [2021-03-10 21:21:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:21:26,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535550319] [2021-03-10 21:21:26,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514924852] [2021-03-10 21:21:26,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:26,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-03-10 21:21:26,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:26,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:21:26,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:21:26,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:26,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:21:26,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512889572] [2021-03-10 21:21:26,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:21:26,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:26,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:21:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:21:26,914 INFO L87 Difference]: Start difference. First operand 40076 states and 102689 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:29,651 INFO L93 Difference]: Finished difference Result 41798 states and 105714 transitions. [2021-03-10 21:21:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:21:29,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:29,704 INFO L225 Difference]: With dead ends: 41798 [2021-03-10 21:21:29,704 INFO L226 Difference]: Without dead ends: 41742 [2021-03-10 21:21:29,704 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:21:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41742 states. [2021-03-10 21:21:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41742 to 40036. [2021-03-10 21:21:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40036 states, 40035 states have (on average 2.561983264643437) internal successors, (102569), 40035 states have internal predecessors, (102569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40036 states to 40036 states and 102569 transitions. [2021-03-10 21:21:30,250 INFO L78 Accepts]: Start accepts. Automaton has 40036 states and 102569 transitions. Word has length 65 [2021-03-10 21:21:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:30,250 INFO L480 AbstractCegarLoop]: Abstraction has 40036 states and 102569 transitions. [2021-03-10 21:21:30,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 40036 states and 102569 transitions. [2021-03-10 21:21:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:30,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:30,270 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:30,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1219,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:30,470 INFO L428 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1742132402, now seen corresponding path program 337 times [2021-03-10 21:21:30,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:30,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688956242] [2021-03-10 21:21:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:21:30,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688956242] [2021-03-10 21:21:30,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474403715] [2021-03-10 21:21:30,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:30,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:21:30,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:21:31,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:31,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:21:31,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60139253] [2021-03-10 21:21:31,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:21:31,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:31,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:21:31,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:21:31,138 INFO L87 Difference]: Start difference. First operand 40036 states and 102569 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:33,211 INFO L93 Difference]: Finished difference Result 42209 states and 106644 transitions. [2021-03-10 21:21:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:21:33,213 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:33,260 INFO L225 Difference]: With dead ends: 42209 [2021-03-10 21:21:33,261 INFO L226 Difference]: Without dead ends: 42168 [2021-03-10 21:21:33,261 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 478.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:21:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42168 states. [2021-03-10 21:21:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42168 to 39435. [2021-03-10 21:21:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39435 states, 39434 states have (on average 2.563676015621038) internal successors, (101096), 39434 states have internal predecessors, (101096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39435 states to 39435 states and 101096 transitions. [2021-03-10 21:21:33,864 INFO L78 Accepts]: Start accepts. Automaton has 39435 states and 101096 transitions. Word has length 65 [2021-03-10 21:21:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:33,864 INFO L480 AbstractCegarLoop]: Abstraction has 39435 states and 101096 transitions. [2021-03-10 21:21:33,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:33,864 INFO L276 IsEmpty]: Start isEmpty. Operand 39435 states and 101096 transitions. [2021-03-10 21:21:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:33,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:33,885 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:34,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-03-10 21:21:34,085 INFO L428 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1584832915, now seen corresponding path program 180 times [2021-03-10 21:21:34,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:34,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140485871] [2021-03-10 21:21:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:21:34,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140485871] [2021-03-10 21:21:34,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397219579] [2021-03-10 21:21:34,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:34,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 21:21:34,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:34,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:21:34,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 113 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:34,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:34,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 16 [2021-03-10 21:21:34,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206321541] [2021-03-10 21:21:34,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:21:34,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:34,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:21:34,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:21:34,786 INFO L87 Difference]: Start difference. First operand 39435 states and 101096 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:35,519 INFO L93 Difference]: Finished difference Result 48480 states and 118582 transitions. [2021-03-10 21:21:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:21:35,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:35,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:35,578 INFO L225 Difference]: With dead ends: 48480 [2021-03-10 21:21:35,578 INFO L226 Difference]: Without dead ends: 48468 [2021-03-10 21:21:35,578 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:21:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48468 states. [2021-03-10 21:21:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48468 to 39499. [2021-03-10 21:21:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39499 states, 39498 states have (on average 2.565243809813155) internal successors, (101322), 39498 states have internal predecessors, (101322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39499 states to 39499 states and 101322 transitions. [2021-03-10 21:21:36,169 INFO L78 Accepts]: Start accepts. Automaton has 39499 states and 101322 transitions. Word has length 65 [2021-03-10 21:21:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:36,169 INFO L480 AbstractCegarLoop]: Abstraction has 39499 states and 101322 transitions. [2021-03-10 21:21:36,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 39499 states and 101322 transitions. [2021-03-10 21:21:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:36,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:36,189 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:36,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-03-10 21:21:36,390 INFO L428 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:36,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:36,390 INFO L82 PathProgramCache]: Analyzing trace with hash -410917560, now seen corresponding path program 338 times [2021-03-10 21:21:36,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:36,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381578307] [2021-03-10 21:21:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:36,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381578307] [2021-03-10 21:21:36,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395736163] [2021-03-10 21:21:36,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:36,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:36,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:36,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:21:36,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:37,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:37,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:21:37,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266360975] [2021-03-10 21:21:37,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:37,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:37,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:37,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:37,033 INFO L87 Difference]: Start difference. First operand 39499 states and 101322 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:39,545 INFO L93 Difference]: Finished difference Result 42502 states and 107140 transitions. [2021-03-10 21:21:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:21:39,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:39,714 INFO L225 Difference]: With dead ends: 42502 [2021-03-10 21:21:39,714 INFO L226 Difference]: Without dead ends: 42490 [2021-03-10 21:21:39,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 544.9ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:21:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42490 states. [2021-03-10 21:21:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42490 to 39534. [2021-03-10 21:21:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39534 states, 39533 states have (on average 2.565072218146865) internal successors, (101405), 39533 states have internal predecessors, (101405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39534 states to 39534 states and 101405 transitions. [2021-03-10 21:21:40,214 INFO L78 Accepts]: Start accepts. Automaton has 39534 states and 101405 transitions. Word has length 65 [2021-03-10 21:21:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:40,214 INFO L480 AbstractCegarLoop]: Abstraction has 39534 states and 101405 transitions. [2021-03-10 21:21:40,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 39534 states and 101405 transitions. [2021-03-10 21:21:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:40,235 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:40,235 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:40,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1224 [2021-03-10 21:21:40,436 INFO L428 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:40,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1270859487, now seen corresponding path program 181 times [2021-03-10 21:21:40,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:40,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486432127] [2021-03-10 21:21:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:21:40,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486432127] [2021-03-10 21:21:40,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950809536] [2021-03-10 21:21:40,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:40,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:21:40,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:41,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:41,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-03-10 21:21:41,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140337346] [2021-03-10 21:21:41,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:41,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:41,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:41,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:41,081 INFO L87 Difference]: Start difference. First operand 39534 states and 101405 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:41,848 INFO L93 Difference]: Finished difference Result 53492 states and 130566 transitions. [2021-03-10 21:21:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:21:41,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:41,921 INFO L225 Difference]: With dead ends: 53492 [2021-03-10 21:21:41,921 INFO L226 Difference]: Without dead ends: 53492 [2021-03-10 21:21:41,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:21:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53492 states. [2021-03-10 21:21:42,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53492 to 39781. [2021-03-10 21:21:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39781 states, 39780 states have (on average 2.568728004022122) internal successors, (102184), 39780 states have internal predecessors, (102184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39781 states to 39781 states and 102184 transitions. [2021-03-10 21:21:42,557 INFO L78 Accepts]: Start accepts. Automaton has 39781 states and 102184 transitions. Word has length 65 [2021-03-10 21:21:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:42,557 INFO L480 AbstractCegarLoop]: Abstraction has 39781 states and 102184 transitions. [2021-03-10 21:21:42,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 39781 states and 102184 transitions. [2021-03-10 21:21:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:42,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:42,577 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:42,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1225 [2021-03-10 21:21:42,778 INFO L428 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:42,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1386535353, now seen corresponding path program 182 times [2021-03-10 21:21:42,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:42,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579830899] [2021-03-10 21:21:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:43,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579830899] [2021-03-10 21:21:43,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067434632] [2021-03-10 21:21:43,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:43,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:43,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:43,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:21:43,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:43,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:43,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-03-10 21:21:43,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714442768] [2021-03-10 21:21:43,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:21:43,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:43,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:21:43,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:21:43,428 INFO L87 Difference]: Start difference. First operand 39781 states and 102184 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:44,165 INFO L93 Difference]: Finished difference Result 50168 states and 122934 transitions. [2021-03-10 21:21:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:21:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:44,232 INFO L225 Difference]: With dead ends: 50168 [2021-03-10 21:21:44,232 INFO L226 Difference]: Without dead ends: 50168 [2021-03-10 21:21:44,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:21:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50168 states. [2021-03-10 21:21:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50168 to 39488. [2021-03-10 21:21:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39488 states, 39487 states have (on average 2.565553220047104) internal successors, (101306), 39487 states have internal predecessors, (101306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39488 states to 39488 states and 101306 transitions. [2021-03-10 21:21:44,894 INFO L78 Accepts]: Start accepts. Automaton has 39488 states and 101306 transitions. Word has length 65 [2021-03-10 21:21:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:44,894 INFO L480 AbstractCegarLoop]: Abstraction has 39488 states and 101306 transitions. [2021-03-10 21:21:44,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 39488 states and 101306 transitions. [2021-03-10 21:21:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:44,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:44,914 INFO L519 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:45,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-03-10 21:21:45,114 INFO L428 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:45,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1121641549, now seen corresponding path program 339 times [2021-03-10 21:21:45,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:45,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897961796] [2021-03-10 21:21:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:45,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897961796] [2021-03-10 21:21:45,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791517862] [2021-03-10 21:21:45,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:45,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:21:45,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:45,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:21:45,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:45,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:45,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 21:21:45,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149518392] [2021-03-10 21:21:45,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:45,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:45,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:45,758 INFO L87 Difference]: Start difference. First operand 39488 states and 101306 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:46,606 INFO L93 Difference]: Finished difference Result 42657 states and 107058 transitions. [2021-03-10 21:21:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:21:46,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-03-10 21:21:46,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:46,657 INFO L225 Difference]: With dead ends: 42657 [2021-03-10 21:21:46,658 INFO L226 Difference]: Without dead ends: 42639 [2021-03-10 21:21:46,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:21:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42639 states. [2021-03-10 21:21:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42639 to 39488. [2021-03-10 21:21:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39488 states, 39487 states have (on average 2.5652999721427303) internal successors, (101296), 39487 states have internal predecessors, (101296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39488 states to 39488 states and 101296 transitions. [2021-03-10 21:21:47,213 INFO L78 Accepts]: Start accepts. Automaton has 39488 states and 101296 transitions. Word has length 65 [2021-03-10 21:21:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:47,213 INFO L480 AbstractCegarLoop]: Abstraction has 39488 states and 101296 transitions. [2021-03-10 21:21:47,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 39488 states and 101296 transitions. [2021-03-10 21:21:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-03-10 21:21:47,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:47,234 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:47,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:47,434 INFO L428 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1172605066, now seen corresponding path program 183 times [2021-03-10 21:21:47,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:47,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346267899] [2021-03-10 21:21:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:21:47,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346267899] [2021-03-10 21:21:47,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249366562] [2021-03-10 21:21:47,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:47,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 21:21:47,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:47,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 46 conjunts are in the unsatisfiable core [2021-03-10 21:21:47,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:00,186 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 21:22:53,893 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-03-10 21:22:53,894 WARN L340 FreeRefinementEngine]: Global settings require throwing the following exception [2021-03-10 21:22:54,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-03-10 21:22:54,095 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:209) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:226) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:206) ... 44 more [2021-03-10 21:22:54,099 INFO L168 Benchmark]: Toolchain (without parser) took 841940.87 ms. Allocated memory was 255.9 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 236.7 MB in the beginning and 2.1 GB in the end (delta: -1.9 GB). Peak memory consumption was 550.7 MB. Max. memory is 16.0 GB. [2021-03-10 21:22:54,099 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:22:54,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.28 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:22:54,099 INFO L168 Benchmark]: Boogie Preprocessor took 9.50 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 938.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:22:54,099 INFO L168 Benchmark]: RCFGBuilder took 156.69 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 238.7 MB in the end (delta: -5.1 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. [2021-03-10 21:22:54,101 INFO L168 Benchmark]: TraceAbstraction took 841749.90 ms. Allocated memory was 255.9 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 238.0 MB in the beginning and 2.1 GB in the end (delta: -1.9 GB). Peak memory consumption was 551.0 MB. Max. memory is 16.0 GB. [2021-03-10 21:22:54,102 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.28 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.50 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 938.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 156.69 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 238.7 MB in the end (delta: -5.1 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 841749.90 ms. Allocated memory was 255.9 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 238.0 MB in the beginning and 2.1 GB in the end (delta: -1.9 GB). Peak memory consumption was 551.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:209) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...