/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/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:26:13,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:26:13,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:26:13,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:26:13,279 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 22:26:13,321 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:26:13,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:26:13,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:26:13,322 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:26:13,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:26:13,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:26:13,327 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:26:13,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:26:13,327 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:26:13,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:26:13,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:26:13,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:26:13,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:26:13,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:26:13,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:26:13,328 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:26:13,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:26:13,328 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:26:13,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:26:13,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:26:13,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:26:13,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:26:13,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:26:13,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:26:13,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:26:13,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:26:13,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:26:13,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:26:13,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:26:13,329 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:26:13,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:26:13,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:26:13,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:26:13,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:26:13,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:26:13,632 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:26:13,634 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:26:13,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2021-03-10 22:26:13,636 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2021-03-10 22:26:13,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:26:13,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:26:13,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:26:13,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:26:13,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:26:13,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (1/1) ... [2021-03-10 22:26:13,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (1/1) ... [2021-03-10 22:26:13,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:26:13,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:26:13,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:26:13,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:26:13,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (1/1) ... [2021-03-10 22:26:13,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (1/1) ... [2021-03-10 22:26:13,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (1/1) ... [2021-03-10 22:26:13,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (1/1) ... [2021-03-10 22:26:13,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (1/1) ... [2021-03-10 22:26:13,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (1/1) ... [2021-03-10 22:26:13,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (1/1) ... [2021-03-10 22:26:13,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:26:13,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:26:13,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:26:13,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:26:13,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (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 22:26:13,792 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:26:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:26:13,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:26:13,793 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:26:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:26:13,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:26:13,793 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:26:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:26:13,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:26:13,794 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 22:26:14,029 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:26:14,029 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:26:14,031 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:26:14 BoogieIcfgContainer [2021-03-10 22:26:14,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:26:14,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:26:14,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:26:14,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:26:14,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:26:13" (1/2) ... [2021-03-10 22:26:14,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ee851a and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:26:14, skipping insertion in model container [2021-03-10 22:26:14,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:26:14" (2/2) ... [2021-03-10 22:26:14,052 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2021-03-10 22:26:14,057 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:26:14,058 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:26:14,063 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:26:14,064 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:26:14,125 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 22:26:14,141 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 22:26:14,158 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:26:14,158 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:26:14,158 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:26:14,158 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:26:14,159 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:26:14,159 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:26:14,159 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:26:14,159 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:26:14,168 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 74 flow [2021-03-10 22:26:14,181 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 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 22:26:14,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 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 22:26:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 22:26:14,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:14,191 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:14,192 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:14,228 INFO L82 PathProgramCache]: Analyzing trace with hash -523912972, now seen corresponding path program 1 times [2021-03-10 22:26:14,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:14,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565581881] [2021-03-10 22:26:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:14,390 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 22:26:14,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565581881] [2021-03-10 22:26:14,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:26:14,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 22:26:14,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27111966] [2021-03-10 22:26:14,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:26:14,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:14,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:26:14,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:26:14,418 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 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) 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 22:26:14,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:14,480 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2021-03-10 22:26:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:26:14,482 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 22:26:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:14,499 INFO L225 Difference]: With dead ends: 134 [2021-03-10 22:26:14,499 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 22:26:14,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:26:14,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 22:26:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-03-10 22:26:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-03-10 22:26:14,557 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 11 [2021-03-10 22:26:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:14,558 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-03-10 22:26:14,558 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 22:26:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-03-10 22:26:14,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:26:14,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:14,561 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:14,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:26:14,562 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1655401882, now seen corresponding path program 1 times [2021-03-10 22:26:14,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:14,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971202742] [2021-03-10 22:26:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:14,626 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 22:26:14,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971202742] [2021-03-10 22:26:14,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566641192] [2021-03-10 22:26:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:26:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:14,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:26:14,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:14,811 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 22:26:14,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:14,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-03-10 22:26:14,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822812173] [2021-03-10 22:26:14,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:26:14,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:14,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:26:14,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:26:14,823 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:14,905 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2021-03-10 22:26:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:26:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:26:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:14,910 INFO L225 Difference]: With dead ends: 169 [2021-03-10 22:26:14,911 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 22:26:14,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 22:26:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-03-10 22:26:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-03-10 22:26:14,921 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 16 [2021-03-10 22:26:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:14,921 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-03-10 22:26:14,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-03-10 22:26:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:26:14,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:14,928 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:15,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 22:26:15,136 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:15,138 INFO L82 PathProgramCache]: Analyzing trace with hash -965799907, now seen corresponding path program 1 times [2021-03-10 22:26:15,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:15,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260609059] [2021-03-10 22:26:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:15,187 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 22:26:15,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260609059] [2021-03-10 22:26:15,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:26:15,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:26:15,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588009459] [2021-03-10 22:26:15,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:26:15,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:15,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:26:15,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:26:15,190 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:15,254 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-03-10 22:26:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:26:15,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:26:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:15,258 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:26:15,260 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:26:15,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:26:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 122. [2021-03-10 22:26:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 121 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 263 transitions. [2021-03-10 22:26:15,281 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 263 transitions. Word has length 16 [2021-03-10 22:26:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:15,281 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 263 transitions. [2021-03-10 22:26:15,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:15,281 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 263 transitions. [2021-03-10 22:26:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:26:15,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:15,282 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:15,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:26:15,282 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:15,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:15,283 INFO L82 PathProgramCache]: Analyzing trace with hash 798457899, now seen corresponding path program 2 times [2021-03-10 22:26:15,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:15,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788701754] [2021-03-10 22:26:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:15,311 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 22:26:15,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788701754] [2021-03-10 22:26:15,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:26:15,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:26:15,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628033238] [2021-03-10 22:26:15,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:26:15,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:15,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:26:15,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:26:15,313 INFO L87 Difference]: Start difference. First operand 122 states and 263 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:15,364 INFO L93 Difference]: Finished difference Result 156 states and 342 transitions. [2021-03-10 22:26:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:26:15,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:26:15,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:15,369 INFO L225 Difference]: With dead ends: 156 [2021-03-10 22:26:15,369 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 22:26:15,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 22:26:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2021-03-10 22:26:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-03-10 22:26:15,387 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-03-10 22:26:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:15,387 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-03-10 22:26:15,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-03-10 22:26:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:26:15,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:15,388 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:15,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:26:15,389 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:15,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:15,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1004932738, now seen corresponding path program 2 times [2021-03-10 22:26:15,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:15,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070813515] [2021-03-10 22:26:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:15,409 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 22:26:15,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070813515] [2021-03-10 22:26:15,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:26:15,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:26:15,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166032588] [2021-03-10 22:26:15,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:26:15,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:15,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:26:15,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:26:15,411 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:15,442 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-03-10 22:26:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:26:15,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:26:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:15,443 INFO L225 Difference]: With dead ends: 156 [2021-03-10 22:26:15,443 INFO L226 Difference]: Without dead ends: 154 [2021-03-10 22:26:15,443 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-10 22:26:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2021-03-10 22:26:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 223 transitions. [2021-03-10 22:26:15,453 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 223 transitions. Word has length 16 [2021-03-10 22:26:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:15,453 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 223 transitions. [2021-03-10 22:26:15,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 223 transitions. [2021-03-10 22:26:15,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:26:15,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:15,454 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:15,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 22:26:15,455 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:15,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:15,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1060614677, now seen corresponding path program 1 times [2021-03-10 22:26:15,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:15,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741830018] [2021-03-10 22:26:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:15,554 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 22:26:15,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741830018] [2021-03-10 22:26:15,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143321593] [2021-03-10 22:26:15,555 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) [2021-03-10 22:26:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:15,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:26:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:15,753 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 22:26:15,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:15,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-03-10 22:26:15,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433530361] [2021-03-10 22:26:15,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:26:15,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:15,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:26:15,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:26:15,755 INFO L87 Difference]: Start difference. First operand 104 states and 223 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 22:26:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:15,892 INFO L93 Difference]: Finished difference Result 226 states and 505 transitions. [2021-03-10 22:26:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:26:15,893 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 21 [2021-03-10 22:26:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:15,894 INFO L225 Difference]: With dead ends: 226 [2021-03-10 22:26:15,894 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 22:26:15,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:26:15,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 22:26:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2021-03-10 22:26:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2024539877300615) internal successors, (359), 163 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 359 transitions. [2021-03-10 22:26:15,907 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 359 transitions. Word has length 21 [2021-03-10 22:26:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:15,907 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 359 transitions. [2021-03-10 22:26:15,908 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 22:26:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 359 transitions. [2021-03-10 22:26:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:26:15,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:15,909 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:16,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:16,119 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:16,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1348728101, now seen corresponding path program 2 times [2021-03-10 22:26:16,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:16,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295486203] [2021-03-10 22:26:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:16,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295486203] [2021-03-10 22:26:16,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:26:16,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:26:16,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437960774] [2021-03-10 22:26:16,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:26:16,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:16,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:26:16,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:26:16,144 INFO L87 Difference]: Start difference. First operand 164 states and 359 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 22:26:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:16,171 INFO L93 Difference]: Finished difference Result 266 states and 560 transitions. [2021-03-10 22:26:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:26:16,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 22:26:16,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:16,173 INFO L225 Difference]: With dead ends: 266 [2021-03-10 22:26:16,173 INFO L226 Difference]: Without dead ends: 266 [2021-03-10 22:26:16,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:26:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-03-10 22:26:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-03-10 22:26:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.171673819742489) internal successors, (506), 233 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 506 transitions. [2021-03-10 22:26:16,181 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 506 transitions. Word has length 26 [2021-03-10 22:26:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:16,181 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 506 transitions. [2021-03-10 22:26:16,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 22:26:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 506 transitions. [2021-03-10 22:26:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:26:16,182 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:16,183 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:16,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 22:26:16,183 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:16,183 INFO L82 PathProgramCache]: Analyzing trace with hash -505952581, now seen corresponding path program 1 times [2021-03-10 22:26:16,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:16,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080701279] [2021-03-10 22:26:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:16,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080701279] [2021-03-10 22:26:16,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072086929] [2021-03-10 22:26:16,240 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:16,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:26:16,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:16,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:16,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:16,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328995300] [2021-03-10 22:26:16,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:16,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:16,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:16,421 INFO L87 Difference]: Start difference. First operand 234 states and 506 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 22:26:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:16,509 INFO L93 Difference]: Finished difference Result 562 states and 1200 transitions. [2021-03-10 22:26:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:26:16,510 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 22:26:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:16,512 INFO L225 Difference]: With dead ends: 562 [2021-03-10 22:26:16,513 INFO L226 Difference]: Without dead ends: 562 [2021-03-10 22:26:16,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:16,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-03-10 22:26:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 438. [2021-03-10 22:26:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.265446224256293) internal successors, (990), 437 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 990 transitions. [2021-03-10 22:26:16,528 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 990 transitions. Word has length 26 [2021-03-10 22:26:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:16,529 INFO L480 AbstractCegarLoop]: Abstraction has 438 states and 990 transitions. [2021-03-10 22:26:16,529 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 22:26:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 990 transitions. [2021-03-10 22:26:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:26:16,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:16,531 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:16,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:16,747 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:16,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1335579773, now seen corresponding path program 2 times [2021-03-10 22:26:16,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:16,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17942149] [2021-03-10 22:26:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:16,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17942149] [2021-03-10 22:26:16,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328843857] [2021-03-10 22:26:16,785 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:16,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:16,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:16,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:16,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:16,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:16,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 22:26:16,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463963129] [2021-03-10 22:26:16,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:26:16,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:16,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:26:16,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:16,896 INFO L87 Difference]: Start difference. First operand 438 states and 990 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 22:26:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:16,942 INFO L93 Difference]: Finished difference Result 491 states and 1077 transitions. [2021-03-10 22:26:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:26:16,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 22:26:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:16,950 INFO L225 Difference]: With dead ends: 491 [2021-03-10 22:26:16,950 INFO L226 Difference]: Without dead ends: 487 [2021-03-10 22:26:16,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-03-10 22:26:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 440. [2021-03-10 22:26:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2574031890660593) internal successors, (991), 439 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 991 transitions. [2021-03-10 22:26:16,965 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 991 transitions. Word has length 26 [2021-03-10 22:26:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:16,966 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 991 transitions. [2021-03-10 22:26:16,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 22:26:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 991 transitions. [2021-03-10 22:26:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:26:16,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:16,969 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:17,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:17,182 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:17,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1641841895, now seen corresponding path program 3 times [2021-03-10 22:26:17,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:17,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490248399] [2021-03-10 22:26:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:17,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490248399] [2021-03-10 22:26:17,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106888315] [2021-03-10 22:26:17,239 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:17,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:26:17,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:17,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:26:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:17,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:17,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 22:26:17,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656563173] [2021-03-10 22:26:17,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:26:17,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:17,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:26:17,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:17,352 INFO L87 Difference]: Start difference. First operand 440 states and 991 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 22:26:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:17,413 INFO L93 Difference]: Finished difference Result 771 states and 1695 transitions. [2021-03-10 22:26:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:26:17,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 22:26:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:17,418 INFO L225 Difference]: With dead ends: 771 [2021-03-10 22:26:17,419 INFO L226 Difference]: Without dead ends: 771 [2021-03-10 22:26:17,419 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-03-10 22:26:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 634. [2021-03-10 22:26:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3175355450236967) internal successors, (1467), 633 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1467 transitions. [2021-03-10 22:26:17,439 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1467 transitions. Word has length 26 [2021-03-10 22:26:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:17,439 INFO L480 AbstractCegarLoop]: Abstraction has 634 states and 1467 transitions. [2021-03-10 22:26:17,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 22:26:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1467 transitions. [2021-03-10 22:26:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:26:17,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:17,442 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:17,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 22:26:17,655 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:17,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1483069401, now seen corresponding path program 4 times [2021-03-10 22:26:17,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:17,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322836563] [2021-03-10 22:26:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:17,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322836563] [2021-03-10 22:26:17,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792986841] [2021-03-10 22:26:17,708 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 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 22:26:17,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:17,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:17,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:26:17,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:17,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:17,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 22:26:17,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648251514] [2021-03-10 22:26:17,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:26:17,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:17,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:26:17,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:17,813 INFO L87 Difference]: Start difference. First operand 634 states and 1467 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 22:26:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:17,861 INFO L93 Difference]: Finished difference Result 763 states and 1678 transitions. [2021-03-10 22:26:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:26:17,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 22:26:17,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:17,864 INFO L225 Difference]: With dead ends: 763 [2021-03-10 22:26:17,865 INFO L226 Difference]: Without dead ends: 759 [2021-03-10 22:26:17,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-03-10 22:26:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 634. [2021-03-10 22:26:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3143759873617693) internal successors, (1465), 633 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1465 transitions. [2021-03-10 22:26:17,883 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1465 transitions. Word has length 26 [2021-03-10 22:26:17,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:17,883 INFO L480 AbstractCegarLoop]: Abstraction has 634 states and 1465 transitions. [2021-03-10 22:26:17,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 22:26:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1465 transitions. [2021-03-10 22:26:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:26:17,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:17,885 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:18,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:18,099 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:18,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:18,100 INFO L82 PathProgramCache]: Analyzing trace with hash 275158029, now seen corresponding path program 5 times [2021-03-10 22:26:18,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:18,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794321254] [2021-03-10 22:26:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:18,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794321254] [2021-03-10 22:26:18,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799505161] [2021-03-10 22:26:18,144 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:18,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:26:18,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:26:18,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:18,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:18,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:18,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890188100] [2021-03-10 22:26:18,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:18,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:18,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:18,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:18,227 INFO L87 Difference]: Start difference. First operand 634 states and 1465 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 22:26:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:18,301 INFO L93 Difference]: Finished difference Result 741 states and 1639 transitions. [2021-03-10 22:26:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:26:18,301 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 22:26:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:18,304 INFO L225 Difference]: With dead ends: 741 [2021-03-10 22:26:18,305 INFO L226 Difference]: Without dead ends: 721 [2021-03-10 22:26:18,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-03-10 22:26:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 654. [2021-03-10 22:26:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.2833078101071975) internal successors, (1491), 653 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1491 transitions. [2021-03-10 22:26:18,324 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1491 transitions. Word has length 26 [2021-03-10 22:26:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:18,324 INFO L480 AbstractCegarLoop]: Abstraction has 654 states and 1491 transitions. [2021-03-10 22:26:18,324 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 22:26:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1491 transitions. [2021-03-10 22:26:18,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:26:18,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:18,327 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:18,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:18,538 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:18,539 INFO L82 PathProgramCache]: Analyzing trace with hash 590448310, now seen corresponding path program 6 times [2021-03-10 22:26:18,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:18,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700143953] [2021-03-10 22:26:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:26:18,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700143953] [2021-03-10 22:26:18,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:26:18,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:26:18,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783518425] [2021-03-10 22:26:18,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:26:18,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:18,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:26:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:26:18,561 INFO L87 Difference]: Start difference. First operand 654 states and 1491 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 22:26:18,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:18,576 INFO L93 Difference]: Finished difference Result 1106 states and 2391 transitions. [2021-03-10 22:26:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:26:18,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 31 [2021-03-10 22:26:18,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:18,581 INFO L225 Difference]: With dead ends: 1106 [2021-03-10 22:26:18,581 INFO L226 Difference]: Without dead ends: 1106 [2021-03-10 22:26:18,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:26:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-03-10 22:26:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1035. [2021-03-10 22:26:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.2030947775628626) internal successors, (2278), 1034 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2278 transitions. [2021-03-10 22:26:18,608 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2278 transitions. Word has length 31 [2021-03-10 22:26:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:18,610 INFO L480 AbstractCegarLoop]: Abstraction has 1035 states and 2278 transitions. [2021-03-10 22:26:18,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 22:26:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2278 transitions. [2021-03-10 22:26:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:26:18,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:18,613 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:18,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-10 22:26:18,613 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:18,613 INFO L82 PathProgramCache]: Analyzing trace with hash 655092438, now seen corresponding path program 1 times [2021-03-10 22:26:18,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:18,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941325344] [2021-03-10 22:26:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:26:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941325344] [2021-03-10 22:26:18,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320931154] [2021-03-10 22:26:18,699 INFO L95 rtionOrderModulation]: Keeping assertion order 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) [2021-03-10 22:26:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:18,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:26:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:26:18,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:18,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 22:26:18,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851156725] [2021-03-10 22:26:18,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:26:18,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:26:18,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:18,816 INFO L87 Difference]: Start difference. First operand 1035 states and 2278 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 22:26:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:18,849 INFO L93 Difference]: Finished difference Result 1734 states and 3766 transitions. [2021-03-10 22:26:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:26:18,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 31 [2021-03-10 22:26:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:18,856 INFO L225 Difference]: With dead ends: 1734 [2021-03-10 22:26:18,856 INFO L226 Difference]: Without dead ends: 1715 [2021-03-10 22:26:18,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-03-10 22:26:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1571. [2021-03-10 22:26:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.212738853503185) internal successors, (3474), 1570 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3474 transitions. [2021-03-10 22:26:18,899 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3474 transitions. Word has length 31 [2021-03-10 22:26:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:18,899 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 3474 transitions. [2021-03-10 22:26:18,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 22:26:18,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3474 transitions. [2021-03-10 22:26:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:26:18,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:18,903 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:19,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 22:26:19,117 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1389409942, now seen corresponding path program 2 times [2021-03-10 22:26:19,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:19,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280241351] [2021-03-10 22:26:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:26:19,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280241351] [2021-03-10 22:26:19,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238330608] [2021-03-10 22:26:19,164 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 22:26:19,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:19,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:19,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:26:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:26:19,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:19,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 22:26:19,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031982058] [2021-03-10 22:26:19,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:26:19,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:19,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:26:19,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:19,255 INFO L87 Difference]: Start difference. First operand 1571 states and 3474 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 22:26:19,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:19,293 INFO L93 Difference]: Finished difference Result 2696 states and 5884 transitions. [2021-03-10 22:26:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:26:19,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 31 [2021-03-10 22:26:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:19,303 INFO L225 Difference]: With dead ends: 2696 [2021-03-10 22:26:19,304 INFO L226 Difference]: Without dead ends: 2677 [2021-03-10 22:26:19,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-03-10 22:26:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2412. [2021-03-10 22:26:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.2310244711737868) internal successors, (5379), 2411 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 5379 transitions. [2021-03-10 22:26:19,367 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 5379 transitions. Word has length 31 [2021-03-10 22:26:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:19,367 INFO L480 AbstractCegarLoop]: Abstraction has 2412 states and 5379 transitions. [2021-03-10 22:26:19,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 22:26:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 5379 transitions. [2021-03-10 22:26:19,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:26:19,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:19,373 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:19,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 22:26:19,587 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:19,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1015199406, now seen corresponding path program 3 times [2021-03-10 22:26:19,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:19,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487526420] [2021-03-10 22:26:19,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:19,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487526420] [2021-03-10 22:26:19,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782691176] [2021-03-10 22:26:19,645 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 22:26:19,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:26:19,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:19,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:26:19,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:19,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:19,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:19,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399551326] [2021-03-10 22:26:19,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:19,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:19,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:19,757 INFO L87 Difference]: Start difference. First operand 2412 states and 5379 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 22:26:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:19,819 INFO L93 Difference]: Finished difference Result 4261 states and 9366 transitions. [2021-03-10 22:26:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:26:19,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 31 [2021-03-10 22:26:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:19,836 INFO L225 Difference]: With dead ends: 4261 [2021-03-10 22:26:19,837 INFO L226 Difference]: Without dead ends: 4236 [2021-03-10 22:26:19,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-03-10 22:26:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3410. [2021-03-10 22:26:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 2.24435318275154) internal successors, (7651), 3409 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 7651 transitions. [2021-03-10 22:26:19,954 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 7651 transitions. Word has length 31 [2021-03-10 22:26:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:19,954 INFO L480 AbstractCegarLoop]: Abstraction has 3410 states and 7651 transitions. [2021-03-10 22:26:19,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 22:26:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 7651 transitions. [2021-03-10 22:26:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:26:19,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:19,960 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:20,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 22:26:20,168 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2091115922, now seen corresponding path program 4 times [2021-03-10 22:26:20,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:20,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9281930] [2021-03-10 22:26:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:20,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9281930] [2021-03-10 22:26:20,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076916971] [2021-03-10 22:26:20,214 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 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 22:26:20,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:20,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:26:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:20,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:20,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:20,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502995116] [2021-03-10 22:26:20,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:20,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:20,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:20,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:20,307 INFO L87 Difference]: Start difference. First operand 3410 states and 7651 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 22:26:20,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:20,366 INFO L93 Difference]: Finished difference Result 4354 states and 9576 transitions. [2021-03-10 22:26:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:26:20,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 31 [2021-03-10 22:26:20,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:20,382 INFO L225 Difference]: With dead ends: 4354 [2021-03-10 22:26:20,382 INFO L226 Difference]: Without dead ends: 4335 [2021-03-10 22:26:20,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-03-10 22:26:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3543. [2021-03-10 22:26:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.2478825522303785) internal successors, (7962), 3542 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 7962 transitions. [2021-03-10 22:26:20,475 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 7962 transitions. Word has length 31 [2021-03-10 22:26:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:20,476 INFO L480 AbstractCegarLoop]: Abstraction has 3543 states and 7962 transitions. [2021-03-10 22:26:20,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 22:26:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 7962 transitions. [2021-03-10 22:26:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:26:20,482 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:20,482 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:20,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:26:20,695 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:20,696 INFO L82 PathProgramCache]: Analyzing trace with hash 702036756, now seen corresponding path program 5 times [2021-03-10 22:26:20,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:20,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760045627] [2021-03-10 22:26:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:26:20,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760045627] [2021-03-10 22:26:20,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271652911] [2021-03-10 22:26:20,749 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 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 22:26:20,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:26:20,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:20,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:26:20,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:26:20,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:20,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 22:26:20,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842286572] [2021-03-10 22:26:20,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:26:20,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:20,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:26:20,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:20,827 INFO L87 Difference]: Start difference. First operand 3543 states and 7962 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 22:26:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:20,872 INFO L93 Difference]: Finished difference Result 4170 states and 9274 transitions. [2021-03-10 22:26:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:26:20,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 31 [2021-03-10 22:26:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:20,892 INFO L225 Difference]: With dead ends: 4170 [2021-03-10 22:26:20,893 INFO L226 Difference]: Without dead ends: 4151 [2021-03-10 22:26:20,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:26:20,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-03-10 22:26:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3929. [2021-03-10 22:26:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 2.253818737270876) internal successors, (8853), 3928 states have internal predecessors, (8853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 8853 transitions. [2021-03-10 22:26:20,975 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 8853 transitions. Word has length 31 [2021-03-10 22:26:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:20,976 INFO L480 AbstractCegarLoop]: Abstraction has 3929 states and 8853 transitions. [2021-03-10 22:26:20,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 22:26:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 8853 transitions. [2021-03-10 22:26:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:26:20,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:20,982 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:21,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 22:26:21,196 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:21,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1049711310, now seen corresponding path program 6 times [2021-03-10 22:26:21,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:21,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295186557] [2021-03-10 22:26:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:21,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295186557] [2021-03-10 22:26:21,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503144277] [2021-03-10 22:26:21,248 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 22:26:21,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:26:21,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:21,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:26:21,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:21,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:21,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:21,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140738580] [2021-03-10 22:26:21,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:21,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:21,341 INFO L87 Difference]: Start difference. First operand 3929 states and 8853 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 22:26:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:21,398 INFO L93 Difference]: Finished difference Result 5348 states and 11836 transitions. [2021-03-10 22:26:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:26:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 31 [2021-03-10 22:26:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:21,409 INFO L225 Difference]: With dead ends: 5348 [2021-03-10 22:26:21,410 INFO L226 Difference]: Without dead ends: 5329 [2021-03-10 22:26:21,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-03-10 22:26:21,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4092. [2021-03-10 22:26:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4091 states have (on average 2.2561720850647764) internal successors, (9230), 4091 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 9230 transitions. [2021-03-10 22:26:21,530 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 9230 transitions. Word has length 31 [2021-03-10 22:26:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:21,530 INFO L480 AbstractCegarLoop]: Abstraction has 4092 states and 9230 transitions. [2021-03-10 22:26:21,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 22:26:21,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 9230 transitions. [2021-03-10 22:26:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:26:21,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:21,537 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:21,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:21,755 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2056604018, now seen corresponding path program 7 times [2021-03-10 22:26:21,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:21,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904187469] [2021-03-10 22:26:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:21,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904187469] [2021-03-10 22:26:21,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70001280] [2021-03-10 22:26:21,796 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:26:21,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:21,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:21,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:21,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544905774] [2021-03-10 22:26:21,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:21,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:21,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:21,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:21,888 INFO L87 Difference]: Start difference. First operand 4092 states and 9230 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 22:26:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:21,946 INFO L93 Difference]: Finished difference Result 5419 states and 11952 transitions. [2021-03-10 22:26:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:26:21,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 31 [2021-03-10 22:26:21,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:21,958 INFO L225 Difference]: With dead ends: 5419 [2021-03-10 22:26:21,958 INFO L226 Difference]: Without dead ends: 5400 [2021-03-10 22:26:21,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-03-10 22:26:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2885. [2021-03-10 22:26:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 2.235090152565881) internal successors, (6446), 2884 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 6446 transitions. [2021-03-10 22:26:22,033 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 6446 transitions. Word has length 31 [2021-03-10 22:26:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:22,034 INFO L480 AbstractCegarLoop]: Abstraction has 2885 states and 6446 transitions. [2021-03-10 22:26:22,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 22:26:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 6446 transitions. [2021-03-10 22:26:22,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:22,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:22,038 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:22,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:22,258 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:22,258 INFO L82 PathProgramCache]: Analyzing trace with hash 467136390, now seen corresponding path program 8 times [2021-03-10 22:26:22,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:22,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209624045] [2021-03-10 22:26:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:22,317 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 22:26:22,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209624045] [2021-03-10 22:26:22,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82771258] [2021-03-10 22:26:22,317 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) [2021-03-10 22:26:22,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:22,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:22,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:22,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:22,401 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 22:26:22,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:22,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:22,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405325752] [2021-03-10 22:26:22,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:22,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:22,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:22,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:22,402 INFO L87 Difference]: Start difference. First operand 2885 states and 6446 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 22:26:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:22,515 INFO L93 Difference]: Finished difference Result 5635 states and 12327 transitions. [2021-03-10 22:26:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:22,516 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 36 [2021-03-10 22:26:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:22,528 INFO L225 Difference]: With dead ends: 5635 [2021-03-10 22:26:22,528 INFO L226 Difference]: Without dead ends: 5635 [2021-03-10 22:26:22,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2021-03-10 22:26:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 3879. [2021-03-10 22:26:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 2.2439401753481176) internal successors, (8702), 3878 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 8702 transitions. [2021-03-10 22:26:22,605 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 8702 transitions. Word has length 36 [2021-03-10 22:26:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:22,605 INFO L480 AbstractCegarLoop]: Abstraction has 3879 states and 8702 transitions. [2021-03-10 22:26:22,606 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 22:26:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 8702 transitions. [2021-03-10 22:26:22,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:22,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:22,613 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:22,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 22:26:22,832 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:22,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1694057605, now seen corresponding path program 9 times [2021-03-10 22:26:22,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:22,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771157579] [2021-03-10 22:26:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:22,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771157579] [2021-03-10 22:26:22,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950898813] [2021-03-10 22:26:22,875 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:22,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:26:22,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:22,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:22,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:22,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:22,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:22,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432528962] [2021-03-10 22:26:22,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:22,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:22,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:22,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:22,982 INFO L87 Difference]: Start difference. First operand 3879 states and 8702 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 22:26:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:23,110 INFO L93 Difference]: Finished difference Result 7170 states and 15945 transitions. [2021-03-10 22:26:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:23,111 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 36 [2021-03-10 22:26:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:23,127 INFO L225 Difference]: With dead ends: 7170 [2021-03-10 22:26:23,127 INFO L226 Difference]: Without dead ends: 7072 [2021-03-10 22:26:23,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2021-03-10 22:26:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6656. [2021-03-10 22:26:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 2.251089406461307) internal successors, (14981), 6655 states have internal predecessors, (14981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 14981 transitions. [2021-03-10 22:26:23,251 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 14981 transitions. Word has length 36 [2021-03-10 22:26:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:23,251 INFO L480 AbstractCegarLoop]: Abstraction has 6656 states and 14981 transitions. [2021-03-10 22:26:23,251 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 22:26:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 14981 transitions. [2021-03-10 22:26:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:23,259 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:23,259 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:23,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:23,479 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:23,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1866861137, now seen corresponding path program 10 times [2021-03-10 22:26:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:23,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969646331] [2021-03-10 22:26:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:23,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969646331] [2021-03-10 22:26:23,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145573663] [2021-03-10 22:26:23,505 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:23,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:23,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:23,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:23,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:23,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:23,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075670806] [2021-03-10 22:26:23,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:23,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:23,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:23,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:23,606 INFO L87 Difference]: Start difference. First operand 6656 states and 14981 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:23,686 INFO L93 Difference]: Finished difference Result 6984 states and 15407 transitions. [2021-03-10 22:26:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-03-10 22:26:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:23,698 INFO L225 Difference]: With dead ends: 6984 [2021-03-10 22:26:23,703 INFO L226 Difference]: Without dead ends: 6984 [2021-03-10 22:26:23,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:23,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6984 states. [2021-03-10 22:26:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6984 to 6596. [2021-03-10 22:26:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.234571645185747) internal successors, (14737), 6595 states have internal predecessors, (14737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 14737 transitions. [2021-03-10 22:26:23,823 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 14737 transitions. Word has length 36 [2021-03-10 22:26:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:23,823 INFO L480 AbstractCegarLoop]: Abstraction has 6596 states and 14737 transitions. [2021-03-10 22:26:23,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 14737 transitions. [2021-03-10 22:26:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:23,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:23,831 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:24,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 22:26:24,035 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:24,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1660386298, now seen corresponding path program 11 times [2021-03-10 22:26:24,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:24,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200980154] [2021-03-10 22:26:24,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:24,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200980154] [2021-03-10 22:26:24,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293543802] [2021-03-10 22:26:24,088 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:24,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:26:24,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:24,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:24,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:24,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:24,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430213543] [2021-03-10 22:26:24,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:24,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:24,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:24,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:24,211 INFO L87 Difference]: Start difference. First operand 6596 states and 14737 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:24,297 INFO L93 Difference]: Finished difference Result 7018 states and 15447 transitions. [2021-03-10 22:26:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:24,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-03-10 22:26:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:24,311 INFO L225 Difference]: With dead ends: 7018 [2021-03-10 22:26:24,311 INFO L226 Difference]: Without dead ends: 7014 [2021-03-10 22:26:24,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-03-10 22:26:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6152. [2021-03-10 22:26:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 2.238497805234921) internal successors, (13769), 6151 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 13769 transitions. [2021-03-10 22:26:24,431 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 13769 transitions. Word has length 36 [2021-03-10 22:26:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:24,431 INFO L480 AbstractCegarLoop]: Abstraction has 6152 states and 13769 transitions. [2021-03-10 22:26:24,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 13769 transitions. [2021-03-10 22:26:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:24,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:24,439 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:24,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 22:26:24,655 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash -542761274, now seen corresponding path program 12 times [2021-03-10 22:26:24,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:24,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42515041] [2021-03-10 22:26:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:24,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42515041] [2021-03-10 22:26:24,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947798134] [2021-03-10 22:26:24,697 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 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 22:26:24,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:26:24,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:24,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:24,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:24,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:24,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389982875] [2021-03-10 22:26:24,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:24,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:24,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:24,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:24,795 INFO L87 Difference]: Start difference. First operand 6152 states and 13769 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:24,880 INFO L93 Difference]: Finished difference Result 9612 states and 21128 transitions. [2021-03-10 22:26:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:24,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-03-10 22:26:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:24,898 INFO L225 Difference]: With dead ends: 9612 [2021-03-10 22:26:24,898 INFO L226 Difference]: Without dead ends: 9612 [2021-03-10 22:26:24,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-03-10 22:26:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 8560. [2021-03-10 22:26:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8560 states, 8559 states have (on average 2.2475756513611405) internal successors, (19237), 8559 states have internal predecessors, (19237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 19237 transitions. [2021-03-10 22:26:25,094 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 19237 transitions. Word has length 36 [2021-03-10 22:26:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:25,095 INFO L480 AbstractCegarLoop]: Abstraction has 8560 states and 19237 transitions. [2021-03-10 22:26:25,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 19237 transitions. [2021-03-10 22:26:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:25,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:25,103 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:25,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 22:26:25,311 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash 452193595, now seen corresponding path program 13 times [2021-03-10 22:26:25,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:25,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786720816] [2021-03-10 22:26:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:25,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786720816] [2021-03-10 22:26:25,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471242146] [2021-03-10 22:26:25,338 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 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 22:26:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:25,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:25,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:25,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:25,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859206792] [2021-03-10 22:26:25,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:25,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:25,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:25,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:25,425 INFO L87 Difference]: Start difference. First operand 8560 states and 19237 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:25,522 INFO L93 Difference]: Finished difference Result 10199 states and 22770 transitions. [2021-03-10 22:26:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-03-10 22:26:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:25,541 INFO L225 Difference]: With dead ends: 10199 [2021-03-10 22:26:25,541 INFO L226 Difference]: Without dead ends: 10193 [2021-03-10 22:26:25,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10193 states. [2021-03-10 22:26:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 9772. [2021-03-10 22:26:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 9771 states have (on average 2.2569849554805037) internal successors, (22053), 9771 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:25,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 22053 transitions. [2021-03-10 22:26:25,732 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 22053 transitions. Word has length 36 [2021-03-10 22:26:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:25,732 INFO L480 AbstractCegarLoop]: Abstraction has 9772 states and 22053 transitions. [2021-03-10 22:26:25,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 22053 transitions. [2021-03-10 22:26:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:25,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:25,741 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:25,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 22:26:25,955 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:25,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:25,956 INFO L82 PathProgramCache]: Analyzing trace with hash 756919215, now seen corresponding path program 14 times [2021-03-10 22:26:25,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:25,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167553617] [2021-03-10 22:26:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:25,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167553617] [2021-03-10 22:26:25,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859225914] [2021-03-10 22:26:25,981 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 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 22:26:26,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:26,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:26,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:26,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:26,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:26,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362295935] [2021-03-10 22:26:26,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:26,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:26,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:26,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:26,057 INFO L87 Difference]: Start difference. First operand 9772 states and 22053 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:26,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:26,150 INFO L93 Difference]: Finished difference Result 10439 states and 23230 transitions. [2021-03-10 22:26:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:26,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-03-10 22:26:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:26,166 INFO L225 Difference]: With dead ends: 10439 [2021-03-10 22:26:26,167 INFO L226 Difference]: Without dead ends: 10437 [2021-03-10 22:26:26,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:26,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-03-10 22:26:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9840. [2021-03-10 22:26:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 2.252363045024901) internal successors, (22161), 9839 states have internal predecessors, (22161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 22161 transitions. [2021-03-10 22:26:26,417 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 22161 transitions. Word has length 36 [2021-03-10 22:26:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:26,417 INFO L480 AbstractCegarLoop]: Abstraction has 9840 states and 22161 transitions. [2021-03-10 22:26:26,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 22161 transitions. [2021-03-10 22:26:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:26,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:26,426 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:26,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 22:26:26,645 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:26,646 INFO L82 PathProgramCache]: Analyzing trace with hash 963394054, now seen corresponding path program 15 times [2021-03-10 22:26:26,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:26,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446480255] [2021-03-10 22:26:26,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:26,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446480255] [2021-03-10 22:26:26,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829815246] [2021-03-10 22:26:26,679 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:26,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:26:26,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:26,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:26:26,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:26:26,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:26,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-03-10 22:26:26,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117638668] [2021-03-10 22:26:26,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:26:26,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:26,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:26:26,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:26,788 INFO L87 Difference]: Start difference. First operand 9840 states and 22161 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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 22:26:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:27,204 INFO L93 Difference]: Finished difference Result 16933 states and 36602 transitions. [2021-03-10 22:26:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 22:26:27,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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 36 [2021-03-10 22:26:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:27,233 INFO L225 Difference]: With dead ends: 16933 [2021-03-10 22:26:27,233 INFO L226 Difference]: Without dead ends: 16887 [2021-03-10 22:26:27,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:26:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2021-03-10 22:26:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 11694. [2021-03-10 22:26:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11694 states, 11693 states have (on average 2.213033438809544) internal successors, (25877), 11693 states have internal predecessors, (25877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 25877 transitions. [2021-03-10 22:26:27,453 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 25877 transitions. Word has length 36 [2021-03-10 22:26:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:27,453 INFO L480 AbstractCegarLoop]: Abstraction has 11694 states and 25877 transitions. [2021-03-10 22:26:27,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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 22:26:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 25877 transitions. [2021-03-10 22:26:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:27,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:27,462 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:27,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:27,675 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1147123141, now seen corresponding path program 16 times [2021-03-10 22:26:27,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:27,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254209004] [2021-03-10 22:26:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:27,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254209004] [2021-03-10 22:26:27,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536001606] [2021-03-10 22:26:27,702 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) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:27,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:27,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:27,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:27,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:27,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:27,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:27,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828340967] [2021-03-10 22:26:27,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:27,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:27,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:27,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:27,787 INFO L87 Difference]: Start difference. First operand 11694 states and 25877 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 22:26:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:27,897 INFO L93 Difference]: Finished difference Result 12577 states and 27332 transitions. [2021-03-10 22:26:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:27,898 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 36 [2021-03-10 22:26:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:27,920 INFO L225 Difference]: With dead ends: 12577 [2021-03-10 22:26:27,920 INFO L226 Difference]: Without dead ends: 12575 [2021-03-10 22:26:27,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-03-10 22:26:28,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 11238. [2021-03-10 22:26:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 11237 states have (on average 2.20352407226128) internal successors, (24761), 11237 states have internal predecessors, (24761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 24761 transitions. [2021-03-10 22:26:28,155 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 24761 transitions. Word has length 36 [2021-03-10 22:26:28,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:28,155 INFO L480 AbstractCegarLoop]: Abstraction has 11238 states and 24761 transitions. [2021-03-10 22:26:28,155 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 22:26:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 24761 transitions. [2021-03-10 22:26:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:28,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:28,162 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:28,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 22:26:28,363 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash 973386407, now seen corresponding path program 17 times [2021-03-10 22:26:28,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:28,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195015401] [2021-03-10 22:26:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:26:28,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195015401] [2021-03-10 22:26:28,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464388487] [2021-03-10 22:26:28,393 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) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:28,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:26:28,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:28,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:28,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:26:28,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:28,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:28,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681332428] [2021-03-10 22:26:28,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:28,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:28,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:28,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:28,466 INFO L87 Difference]: Start difference. First operand 11238 states and 24761 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 22:26:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:28,570 INFO L93 Difference]: Finished difference Result 11745 states and 25558 transitions. [2021-03-10 22:26:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:26:28,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 36 [2021-03-10 22:26:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:28,589 INFO L225 Difference]: With dead ends: 11745 [2021-03-10 22:26:28,589 INFO L226 Difference]: Without dead ends: 11709 [2021-03-10 22:26:28,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:28,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-03-10 22:26:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11232. [2021-03-10 22:26:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 2.19740005342356) internal successors, (24679), 11231 states have internal predecessors, (24679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 24679 transitions. [2021-03-10 22:26:28,768 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 24679 transitions. Word has length 36 [2021-03-10 22:26:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:28,768 INFO L480 AbstractCegarLoop]: Abstraction has 11232 states and 24679 transitions. [2021-03-10 22:26:28,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 22:26:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 24679 transitions. [2021-03-10 22:26:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:28,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:28,831 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:29,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:29,032 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1610257349, now seen corresponding path program 18 times [2021-03-10 22:26:29,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:29,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867649914] [2021-03-10 22:26:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:29,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867649914] [2021-03-10 22:26:29,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305253029] [2021-03-10 22:26:29,058 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:29,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:26:29,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:29,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:29,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:29,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:29,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:29,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249164082] [2021-03-10 22:26:29,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:29,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:29,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:29,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:29,143 INFO L87 Difference]: Start difference. First operand 11232 states and 24679 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:29,250 INFO L93 Difference]: Finished difference Result 13428 states and 29318 transitions. [2021-03-10 22:26:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:29,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-03-10 22:26:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:29,274 INFO L225 Difference]: With dead ends: 13428 [2021-03-10 22:26:29,274 INFO L226 Difference]: Without dead ends: 13422 [2021-03-10 22:26:29,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13422 states. [2021-03-10 22:26:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13422 to 12944. [2021-03-10 22:26:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12944 states, 12943 states have (on average 2.2074480414123463) internal successors, (28571), 12943 states have internal predecessors, (28571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 28571 transitions. [2021-03-10 22:26:29,518 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 28571 transitions. Word has length 36 [2021-03-10 22:26:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:29,518 INFO L480 AbstractCegarLoop]: Abstraction has 12944 states and 28571 transitions. [2021-03-10 22:26:29,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 28571 transitions. [2021-03-10 22:26:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:29,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:29,525 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:29,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 22:26:29,733 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1305531729, now seen corresponding path program 19 times [2021-03-10 22:26:29,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:29,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013848229] [2021-03-10 22:26:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:29,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013848229] [2021-03-10 22:26:29,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047502963] [2021-03-10 22:26:29,760 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:29,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:29,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:29,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:29,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:26:29,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795100471] [2021-03-10 22:26:29,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:26:29,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:26:29,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:26:29,861 INFO L87 Difference]: Start difference. First operand 12944 states and 28571 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:29,951 INFO L93 Difference]: Finished difference Result 13864 states and 30236 transitions. [2021-03-10 22:26:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-03-10 22:26:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:29,965 INFO L225 Difference]: With dead ends: 13864 [2021-03-10 22:26:29,965 INFO L226 Difference]: Without dead ends: 13864 [2021-03-10 22:26:29,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-03-10 22:26:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 12976. [2021-03-10 22:26:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12976 states, 12975 states have (on average 2.206936416184971) internal successors, (28635), 12975 states have internal predecessors, (28635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12976 states to 12976 states and 28635 transitions. [2021-03-10 22:26:30,099 INFO L78 Accepts]: Start accepts. Automaton has 12976 states and 28635 transitions. Word has length 36 [2021-03-10 22:26:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:30,099 INFO L480 AbstractCegarLoop]: Abstraction has 12976 states and 28635 transitions. [2021-03-10 22:26:30,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 22:26:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 12976 states and 28635 transitions. [2021-03-10 22:26:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:30,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:30,104 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:30,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:30,304 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash -915327803, now seen corresponding path program 20 times [2021-03-10 22:26:30,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:30,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756940024] [2021-03-10 22:26:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:30,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756940024] [2021-03-10 22:26:30,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380780829] [2021-03-10 22:26:30,334 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 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 22:26:30,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:30,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:30,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:30,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:30,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:30,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:30,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184909750] [2021-03-10 22:26:30,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:30,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:30,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:30,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:30,517 INFO L87 Difference]: Start difference. First operand 12976 states and 28635 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 22:26:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:30,659 INFO L93 Difference]: Finished difference Result 14564 states and 31706 transitions. [2021-03-10 22:26:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:26:30,660 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 36 [2021-03-10 22:26:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:30,685 INFO L225 Difference]: With dead ends: 14564 [2021-03-10 22:26:30,685 INFO L226 Difference]: Without dead ends: 14564 [2021-03-10 22:26:30,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:26:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2021-03-10 22:26:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 13136. [2021-03-10 22:26:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 13135 states have (on average 2.204415683288923) internal successors, (28955), 13135 states have internal predecessors, (28955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 28955 transitions. [2021-03-10 22:26:30,900 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 28955 transitions. Word has length 36 [2021-03-10 22:26:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:30,901 INFO L480 AbstractCegarLoop]: Abstraction has 13136 states and 28955 transitions. [2021-03-10 22:26:30,901 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 22:26:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 28955 transitions. [2021-03-10 22:26:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 22:26:30,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:30,909 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:31,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 22:26:31,110 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash 537537127, now seen corresponding path program 21 times [2021-03-10 22:26:31,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:31,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994230403] [2021-03-10 22:26:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:31,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994230403] [2021-03-10 22:26:31,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141472698] [2021-03-10 22:26:31,202 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 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 22:26:31,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:26:31,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:31,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:26:31,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:31,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:31,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:31,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307325097] [2021-03-10 22:26:31,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:31,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:31,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:31,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:31,301 INFO L87 Difference]: Start difference. First operand 13136 states and 28955 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 22:26:31,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:31,426 INFO L93 Difference]: Finished difference Result 14130 states and 30823 transitions. [2021-03-10 22:26:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:31,427 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 36 [2021-03-10 22:26:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:31,452 INFO L225 Difference]: With dead ends: 14130 [2021-03-10 22:26:31,452 INFO L226 Difference]: Without dead ends: 14130 [2021-03-10 22:26:31,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14130 states. [2021-03-10 22:26:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14130 to 12516. [2021-03-10 22:26:31,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12516 states, 12515 states have (on average 2.204314822213344) internal successors, (27587), 12515 states have internal predecessors, (27587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12516 states to 12516 states and 27587 transitions. [2021-03-10 22:26:31,664 INFO L78 Accepts]: Start accepts. Automaton has 12516 states and 27587 transitions. Word has length 36 [2021-03-10 22:26:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:31,664 INFO L480 AbstractCegarLoop]: Abstraction has 12516 states and 27587 transitions. [2021-03-10 22:26:31,665 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 22:26:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 12516 states and 27587 transitions. [2021-03-10 22:26:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:31,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:31,679 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:31,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:31,884 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:31,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:31,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1450078555, now seen corresponding path program 22 times [2021-03-10 22:26:31,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:31,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596335535] [2021-03-10 22:26:31,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:31,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596335535] [2021-03-10 22:26:31,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19988602] [2021-03-10 22:26:31,933 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 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 22:26:32,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:32,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:32,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:32,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:32,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:32,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:26:32,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129105171] [2021-03-10 22:26:32,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:26:32,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:32,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:26:32,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:26:32,097 INFO L87 Difference]: Start difference. First operand 12516 states and 27587 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 22:26:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:32,271 INFO L93 Difference]: Finished difference Result 15926 states and 34731 transitions. [2021-03-10 22:26:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:32,271 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 46 [2021-03-10 22:26:32,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:32,300 INFO L225 Difference]: With dead ends: 15926 [2021-03-10 22:26:32,300 INFO L226 Difference]: Without dead ends: 15926 [2021-03-10 22:26:32,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:26:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2021-03-10 22:26:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 13120. [2021-03-10 22:26:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13120 states, 13119 states have (on average 2.2095434103209084) internal successors, (28987), 13119 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 28987 transitions. [2021-03-10 22:26:32,530 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 28987 transitions. Word has length 46 [2021-03-10 22:26:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:32,530 INFO L480 AbstractCegarLoop]: Abstraction has 13120 states and 28987 transitions. [2021-03-10 22:26:32,530 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 22:26:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 28987 transitions. [2021-03-10 22:26:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:32,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:32,545 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:32,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 22:26:32,759 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:32,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1917671971, now seen corresponding path program 23 times [2021-03-10 22:26:32,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:32,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262930110] [2021-03-10 22:26:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:32,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262930110] [2021-03-10 22:26:32,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95639624] [2021-03-10 22:26:32,791 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 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 22:26:32,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:26:32,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:32,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:32,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:32,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:32,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:32,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232217001] [2021-03-10 22:26:32,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:32,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:32,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:32,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:32,896 INFO L87 Difference]: Start difference. First operand 13120 states and 28987 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:33,013 INFO L93 Difference]: Finished difference Result 13630 states and 29839 transitions. [2021-03-10 22:26:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:33,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-03-10 22:26:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:33,037 INFO L225 Difference]: With dead ends: 13630 [2021-03-10 22:26:33,037 INFO L226 Difference]: Without dead ends: 13622 [2021-03-10 22:26:33,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-03-10 22:26:33,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13056. [2021-03-10 22:26:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13056 states, 13055 states have (on average 2.2050555342780545) internal successors, (28787), 13055 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 28787 transitions. [2021-03-10 22:26:33,292 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 28787 transitions. Word has length 46 [2021-03-10 22:26:33,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:33,292 INFO L480 AbstractCegarLoop]: Abstraction has 13056 states and 28787 transitions. [2021-03-10 22:26:33,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 28787 transitions. [2021-03-10 22:26:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:33,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:33,306 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:33,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:33,519 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:33,519 INFO L82 PathProgramCache]: Analyzing trace with hash -613294009, now seen corresponding path program 24 times [2021-03-10 22:26:33,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:33,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106082608] [2021-03-10 22:26:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:33,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106082608] [2021-03-10 22:26:33,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414237845] [2021-03-10 22:26:33,553 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 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 22:26:33,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:26:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:33,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:33,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:33,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:33,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872517363] [2021-03-10 22:26:33,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:33,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:33,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:33,658 INFO L87 Difference]: Start difference. First operand 13056 states and 28787 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:33,785 INFO L93 Difference]: Finished difference Result 17393 states and 37929 transitions. [2021-03-10 22:26:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:33,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-03-10 22:26:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:33,816 INFO L225 Difference]: With dead ends: 17393 [2021-03-10 22:26:33,816 INFO L226 Difference]: Without dead ends: 17393 [2021-03-10 22:26:33,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2021-03-10 22:26:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 15686. [2021-03-10 22:26:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15686 states, 15685 states have (on average 2.224099458080969) internal successors, (34885), 15685 states have internal predecessors, (34885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:34,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15686 states to 15686 states and 34885 transitions. [2021-03-10 22:26:34,064 INFO L78 Accepts]: Start accepts. Automaton has 15686 states and 34885 transitions. Word has length 46 [2021-03-10 22:26:34,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:34,064 INFO L480 AbstractCegarLoop]: Abstraction has 15686 states and 34885 transitions. [2021-03-10 22:26:34,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:34,064 INFO L276 IsEmpty]: Start isEmpty. Operand 15686 states and 34885 transitions. [2021-03-10 22:26:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:34,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:34,078 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:34,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 22:26:34,279 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash 556761991, now seen corresponding path program 25 times [2021-03-10 22:26:34,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:34,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005813341] [2021-03-10 22:26:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:34,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005813341] [2021-03-10 22:26:34,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325288241] [2021-03-10 22:26:34,308 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:34,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:34,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:34,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:34,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714067735] [2021-03-10 22:26:34,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:34,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:34,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:34,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:34,410 INFO L87 Difference]: Start difference. First operand 15686 states and 34885 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:34,541 INFO L93 Difference]: Finished difference Result 16911 states and 36914 transitions. [2021-03-10 22:26:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:34,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-03-10 22:26:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:34,570 INFO L225 Difference]: With dead ends: 16911 [2021-03-10 22:26:34,570 INFO L226 Difference]: Without dead ends: 16863 [2021-03-10 22:26:34,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2021-03-10 22:26:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 14310. [2021-03-10 22:26:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14310 states, 14309 states have (on average 2.212104270039835) internal successors, (31653), 14309 states have internal predecessors, (31653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14310 states to 14310 states and 31653 transitions. [2021-03-10 22:26:34,905 INFO L78 Accepts]: Start accepts. Automaton has 14310 states and 31653 transitions. Word has length 46 [2021-03-10 22:26:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:34,905 INFO L480 AbstractCegarLoop]: Abstraction has 14310 states and 31653 transitions. [2021-03-10 22:26:34,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 14310 states and 31653 transitions. [2021-03-10 22:26:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:34,921 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:34,921 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:35,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 22:26:35,135 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:35,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1979977875, now seen corresponding path program 26 times [2021-03-10 22:26:35,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:35,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302053660] [2021-03-10 22:26:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:35,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302053660] [2021-03-10 22:26:35,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973026435] [2021-03-10 22:26:35,172 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:35,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:35,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:35,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:35,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:35,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:35,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584207587] [2021-03-10 22:26:35,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:35,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:35,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:35,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:35,277 INFO L87 Difference]: Start difference. First operand 14310 states and 31653 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 22:26:35,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:35,439 INFO L93 Difference]: Finished difference Result 15209 states and 33173 transitions. [2021-03-10 22:26:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:26:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 46 [2021-03-10 22:26:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:35,466 INFO L225 Difference]: With dead ends: 15209 [2021-03-10 22:26:35,467 INFO L226 Difference]: Without dead ends: 15137 [2021-03-10 22:26:35,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:35,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15137 states. [2021-03-10 22:26:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15137 to 14314. [2021-03-10 22:26:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14314 states, 14313 states have (on average 2.2051980716830855) internal successors, (31563), 14313 states have internal predecessors, (31563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14314 states to 14314 states and 31563 transitions. [2021-03-10 22:26:35,747 INFO L78 Accepts]: Start accepts. Automaton has 14314 states and 31563 transitions. Word has length 46 [2021-03-10 22:26:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:35,747 INFO L480 AbstractCegarLoop]: Abstraction has 14314 states and 31563 transitions. [2021-03-10 22:26:35,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 22:26:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 14314 states and 31563 transitions. [2021-03-10 22:26:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:35,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:35,762 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:35,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 22:26:35,982 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash 443374363, now seen corresponding path program 27 times [2021-03-10 22:26:35,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:35,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088706894] [2021-03-10 22:26:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:26:36,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088706894] [2021-03-10 22:26:36,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931212111] [2021-03-10 22:26:36,023 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 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 22:26:36,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:26:36,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:36,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:36,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:26:36,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:36,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:36,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89512638] [2021-03-10 22:26:36,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:36,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:36,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:36,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:36,121 INFO L87 Difference]: Start difference. First operand 14314 states and 31563 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 22:26:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:36,249 INFO L93 Difference]: Finished difference Result 18333 states and 40131 transitions. [2021-03-10 22:26:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:26:36,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 46 [2021-03-10 22:26:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:36,285 INFO L225 Difference]: With dead ends: 18333 [2021-03-10 22:26:36,285 INFO L226 Difference]: Without dead ends: 18330 [2021-03-10 22:26:36,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18330 states. [2021-03-10 22:26:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18330 to 15498. [2021-03-10 22:26:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 15497 states have (on average 2.2112021681615794) internal successors, (34267), 15497 states have internal predecessors, (34267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 34267 transitions. [2021-03-10 22:26:36,578 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 34267 transitions. Word has length 46 [2021-03-10 22:26:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:36,578 INFO L480 AbstractCegarLoop]: Abstraction has 15498 states and 34267 transitions. [2021-03-10 22:26:36,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 22:26:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 34267 transitions. [2021-03-10 22:26:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:36,592 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:36,592 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:36,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 22:26:36,793 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash 729697573, now seen corresponding path program 28 times [2021-03-10 22:26:36,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:36,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268491385] [2021-03-10 22:26:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:36,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268491385] [2021-03-10 22:26:36,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881592072] [2021-03-10 22:26:36,820 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:36,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:36,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:36,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:36,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:36,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:36,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:36,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136829100] [2021-03-10 22:26:36,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:36,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:36,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:36,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:36,920 INFO L87 Difference]: Start difference. First operand 15498 states and 34267 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:37,054 INFO L93 Difference]: Finished difference Result 20808 states and 45501 transitions. [2021-03-10 22:26:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:37,054 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-03-10 22:26:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:37,089 INFO L225 Difference]: With dead ends: 20808 [2021-03-10 22:26:37,090 INFO L226 Difference]: Without dead ends: 20808 [2021-03-10 22:26:37,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20808 states. [2021-03-10 22:26:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20808 to 19050. [2021-03-10 22:26:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19050 states, 19049 states have (on average 2.2252611685652792) internal successors, (42389), 19049 states have internal predecessors, (42389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19050 states to 19050 states and 42389 transitions. [2021-03-10 22:26:37,402 INFO L78 Accepts]: Start accepts. Automaton has 19050 states and 42389 transitions. Word has length 46 [2021-03-10 22:26:37,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:37,403 INFO L480 AbstractCegarLoop]: Abstraction has 19050 states and 42389 transitions. [2021-03-10 22:26:37,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:37,403 INFO L276 IsEmpty]: Start isEmpty. Operand 19050 states and 42389 transitions. [2021-03-10 22:26:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:37,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:37,421 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:37,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:37,636 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1899753573, now seen corresponding path program 29 times [2021-03-10 22:26:37,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:37,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716860366] [2021-03-10 22:26:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:37,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716860366] [2021-03-10 22:26:37,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026927253] [2021-03-10 22:26:37,665 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 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 22:26:37,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:26:37,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:37,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:37,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:37,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:37,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357044188] [2021-03-10 22:26:37,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:37,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:37,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:37,751 INFO L87 Difference]: Start difference. First operand 19050 states and 42389 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:37,893 INFO L93 Difference]: Finished difference Result 20381 states and 44592 transitions. [2021-03-10 22:26:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-03-10 22:26:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:37,926 INFO L225 Difference]: With dead ends: 20381 [2021-03-10 22:26:37,927 INFO L226 Difference]: Without dead ends: 20349 [2021-03-10 22:26:37,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:37,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2021-03-10 22:26:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 19030. [2021-03-10 22:26:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.2227652530348414) internal successors, (42297), 19029 states have internal predecessors, (42297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42297 transitions. [2021-03-10 22:26:38,235 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42297 transitions. Word has length 46 [2021-03-10 22:26:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:38,235 INFO L480 AbstractCegarLoop]: Abstraction has 19030 states and 42297 transitions. [2021-03-10 22:26:38,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42297 transitions. [2021-03-10 22:26:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:38,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:38,254 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:38,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-03-10 22:26:38,454 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash -636986293, now seen corresponding path program 30 times [2021-03-10 22:26:38,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:38,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932678190] [2021-03-10 22:26:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:38,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932678190] [2021-03-10 22:26:38,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453531339] [2021-03-10 22:26:38,490 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:38,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:26:38,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:38,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:38,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:38,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:38,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598058440] [2021-03-10 22:26:38,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:38,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:38,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:38,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:38,690 INFO L87 Difference]: Start difference. First operand 19030 states and 42297 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 22:26:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:38,852 INFO L93 Difference]: Finished difference Result 20409 states and 44584 transitions. [2021-03-10 22:26:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:26:38,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 46 [2021-03-10 22:26:38,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:38,890 INFO L225 Difference]: With dead ends: 20409 [2021-03-10 22:26:38,890 INFO L226 Difference]: Without dead ends: 20337 [2021-03-10 22:26:38,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20337 states. [2021-03-10 22:26:39,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20337 to 19030. [2021-03-10 22:26:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.216459088759262) internal successors, (42177), 19029 states have internal predecessors, (42177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42177 transitions. [2021-03-10 22:26:39,226 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42177 transitions. Word has length 46 [2021-03-10 22:26:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:39,230 INFO L480 AbstractCegarLoop]: Abstraction has 19030 states and 42177 transitions. [2021-03-10 22:26:39,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 22:26:39,230 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42177 transitions. [2021-03-10 22:26:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:39,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:39,251 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:39,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 22:26:39,470 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash 725045157, now seen corresponding path program 31 times [2021-03-10 22:26:39,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:39,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083720404] [2021-03-10 22:26:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:39,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083720404] [2021-03-10 22:26:39,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399295983] [2021-03-10 22:26:39,523 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:39,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:39,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:39,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:39,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:26:39,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364454248] [2021-03-10 22:26:39,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:26:39,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:26:39,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:39,610 INFO L87 Difference]: Start difference. First operand 19030 states and 42177 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 22:26:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:39,779 INFO L93 Difference]: Finished difference Result 20155 states and 44063 transitions. [2021-03-10 22:26:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:26:39,780 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 46 [2021-03-10 22:26:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:39,814 INFO L225 Difference]: With dead ends: 20155 [2021-03-10 22:26:39,814 INFO L226 Difference]: Without dead ends: 20027 [2021-03-10 22:26:39,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:26:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-03-10 22:26:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 19078. [2021-03-10 22:26:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19078 states, 19077 states have (on average 2.210043507889081) internal successors, (42161), 19077 states have internal predecessors, (42161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 42161 transitions. [2021-03-10 22:26:40,126 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 42161 transitions. Word has length 46 [2021-03-10 22:26:40,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:40,126 INFO L480 AbstractCegarLoop]: Abstraction has 19078 states and 42161 transitions. [2021-03-10 22:26:40,126 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 22:26:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 42161 transitions. [2021-03-10 22:26:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:40,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:40,145 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:40,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:40,346 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:40,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:40,346 INFO L82 PathProgramCache]: Analyzing trace with hash -876630137, now seen corresponding path program 32 times [2021-03-10 22:26:40,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:40,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420938677] [2021-03-10 22:26:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:26:40,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420938677] [2021-03-10 22:26:40,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818771280] [2021-03-10 22:26:40,384 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 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 22:26:40,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:40,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:40,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:40,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:26:40,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:40,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:26:40,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885311629] [2021-03-10 22:26:40,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:26:40,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:26:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:40,475 INFO L87 Difference]: Start difference. First operand 19078 states and 42161 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 22:26:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:40,632 INFO L93 Difference]: Finished difference Result 20680 states and 45191 transitions. [2021-03-10 22:26:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:40,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 46 [2021-03-10 22:26:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:40,736 INFO L225 Difference]: With dead ends: 20680 [2021-03-10 22:26:40,736 INFO L226 Difference]: Without dead ends: 20680 [2021-03-10 22:26:40,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:26:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-03-10 22:26:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 17730. [2021-03-10 22:26:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17730 states, 17729 states have (on average 2.2009701618816626) internal successors, (39021), 17729 states have internal predecessors, (39021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 39021 transitions. [2021-03-10 22:26:41,002 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 39021 transitions. Word has length 46 [2021-03-10 22:26:41,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:41,002 INFO L480 AbstractCegarLoop]: Abstraction has 17730 states and 39021 transitions. [2021-03-10 22:26:41,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 22:26:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 39021 transitions. [2021-03-10 22:26:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:41,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:41,021 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:41,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 22:26:41,222 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1293149669, now seen corresponding path program 33 times [2021-03-10 22:26:41,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:41,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252553623] [2021-03-10 22:26:41,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:26:41,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252553623] [2021-03-10 22:26:41,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725669137] [2021-03-10 22:26:41,255 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 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 22:26:41,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:26:41,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:41,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:41,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:26:41,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:41,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:41,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537185164] [2021-03-10 22:26:41,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:41,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:41,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:41,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:41,355 INFO L87 Difference]: Start difference. First operand 17730 states and 39021 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 22:26:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:41,499 INFO L93 Difference]: Finished difference Result 19104 states and 41588 transitions. [2021-03-10 22:26:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:41,499 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 46 [2021-03-10 22:26:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:41,532 INFO L225 Difference]: With dead ends: 19104 [2021-03-10 22:26:41,532 INFO L226 Difference]: Without dead ends: 19104 [2021-03-10 22:26:41,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19104 states. [2021-03-10 22:26:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19104 to 17742. [2021-03-10 22:26:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17742 states, 17741 states have (on average 2.200834225804633) internal successors, (39045), 17741 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17742 states to 17742 states and 39045 transitions. [2021-03-10 22:26:41,819 INFO L78 Accepts]: Start accepts. Automaton has 17742 states and 39045 transitions. Word has length 46 [2021-03-10 22:26:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:41,819 INFO L480 AbstractCegarLoop]: Abstraction has 17742 states and 39045 transitions. [2021-03-10 22:26:41,819 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 22:26:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 17742 states and 39045 transitions. [2021-03-10 22:26:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:41,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:41,837 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:42,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:42,038 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:42,038 INFO L82 PathProgramCache]: Analyzing trace with hash -731848889, now seen corresponding path program 34 times [2021-03-10 22:26:42,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:42,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215898939] [2021-03-10 22:26:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:42,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215898939] [2021-03-10 22:26:42,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126971406] [2021-03-10 22:26:42,066 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:42,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:42,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:26:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:42,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:42,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:42,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213714322] [2021-03-10 22:26:42,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:42,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:42,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:42,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:42,166 INFO L87 Difference]: Start difference. First operand 17742 states and 39045 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:42,301 INFO L93 Difference]: Finished difference Result 21829 states and 47682 transitions. [2021-03-10 22:26:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:42,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-03-10 22:26:42,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:42,339 INFO L225 Difference]: With dead ends: 21829 [2021-03-10 22:26:42,339 INFO L226 Difference]: Without dead ends: 21829 [2021-03-10 22:26:42,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21829 states. [2021-03-10 22:26:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21829 to 20406. [2021-03-10 22:26:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20406 states, 20405 states have (on average 2.2182308257779955) internal successors, (45263), 20405 states have internal predecessors, (45263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 45263 transitions. [2021-03-10 22:26:42,764 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 45263 transitions. Word has length 46 [2021-03-10 22:26:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:42,764 INFO L480 AbstractCegarLoop]: Abstraction has 20406 states and 45263 transitions. [2021-03-10 22:26:42,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 45263 transitions. [2021-03-10 22:26:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:42,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:42,785 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:42,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 22:26:42,985 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:42,986 INFO L82 PathProgramCache]: Analyzing trace with hash 438207111, now seen corresponding path program 35 times [2021-03-10 22:26:42,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:42,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018502113] [2021-03-10 22:26:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:43,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018502113] [2021-03-10 22:26:43,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720959253] [2021-03-10 22:26:43,017 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:43,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:26:43,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:43,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:43,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:43,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:26:43,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572480417] [2021-03-10 22:26:43,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:26:43,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:43,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:26:43,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:26:43,111 INFO L87 Difference]: Start difference. First operand 20406 states and 45263 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:43,268 INFO L93 Difference]: Finished difference Result 21712 states and 47427 transitions. [2021-03-10 22:26:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:26:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-03-10 22:26:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:43,309 INFO L225 Difference]: With dead ends: 21712 [2021-03-10 22:26:43,309 INFO L226 Difference]: Without dead ends: 21704 [2021-03-10 22:26:43,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:26:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21704 states. [2021-03-10 22:26:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21704 to 20402. [2021-03-10 22:26:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.21768540757806) internal successors, (45243), 20401 states have internal predecessors, (45243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45243 transitions. [2021-03-10 22:26:43,705 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45243 transitions. Word has length 46 [2021-03-10 22:26:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:43,706 INFO L480 AbstractCegarLoop]: Abstraction has 20402 states and 45243 transitions. [2021-03-10 22:26:43,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 22:26:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45243 transitions. [2021-03-10 22:26:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 22:26:43,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:43,727 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:43,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:43,927 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2098532755, now seen corresponding path program 36 times [2021-03-10 22:26:43,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:43,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629168538] [2021-03-10 22:26:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:43,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629168538] [2021-03-10 22:26:43,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341864158] [2021-03-10 22:26:43,961 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:43,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:26:43,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:43,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:26:43,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:26:44,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:44,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 22:26:44,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037118503] [2021-03-10 22:26:44,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:26:44,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:26:44,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:44,106 INFO L87 Difference]: Start difference. First operand 20402 states and 45243 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 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 22:26:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:44,663 INFO L93 Difference]: Finished difference Result 28400 states and 61628 transitions. [2021-03-10 22:26:44,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:26:44,664 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 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 46 [2021-03-10 22:26:44,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:44,722 INFO L225 Difference]: With dead ends: 28400 [2021-03-10 22:26:44,722 INFO L226 Difference]: Without dead ends: 28376 [2021-03-10 22:26:44,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:26:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28376 states. [2021-03-10 22:26:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28376 to 20402. [2021-03-10 22:26:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.212979755894319) internal successors, (45147), 20401 states have internal predecessors, (45147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45147 transitions. [2021-03-10 22:26:45,135 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45147 transitions. Word has length 46 [2021-03-10 22:26:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:45,135 INFO L480 AbstractCegarLoop]: Abstraction has 20402 states and 45147 transitions. [2021-03-10 22:26:45,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 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 22:26:45,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45147 transitions. [2021-03-10 22:26:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:45,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:45,164 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:45,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 22:26:45,387 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:45,387 INFO L82 PathProgramCache]: Analyzing trace with hash -676350810, now seen corresponding path program 37 times [2021-03-10 22:26:45,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:45,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853151985] [2021-03-10 22:26:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:45,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853151985] [2021-03-10 22:26:45,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174446853] [2021-03-10 22:26:45,451 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:45,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:45,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:45,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:45,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:26:45,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281066117] [2021-03-10 22:26:45,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:26:45,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:45,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:26:45,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:26:45,563 INFO L87 Difference]: Start difference. First operand 20402 states and 45147 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 22:26:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:45,800 INFO L93 Difference]: Finished difference Result 25889 states and 56595 transitions. [2021-03-10 22:26:45,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:26:45,800 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 56 [2021-03-10 22:26:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:45,847 INFO L225 Difference]: With dead ends: 25889 [2021-03-10 22:26:45,848 INFO L226 Difference]: Without dead ends: 25889 [2021-03-10 22:26:45,848 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:26:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25889 states. [2021-03-10 22:26:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25889 to 21836. [2021-03-10 22:26:46,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21836 states, 21835 states have (on average 2.216762079230593) internal successors, (48403), 21835 states have internal predecessors, (48403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21836 states to 21836 states and 48403 transitions. [2021-03-10 22:26:46,338 INFO L78 Accepts]: Start accepts. Automaton has 21836 states and 48403 transitions. Word has length 56 [2021-03-10 22:26:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:46,338 INFO L480 AbstractCegarLoop]: Abstraction has 21836 states and 48403 transitions. [2021-03-10 22:26:46,338 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 22:26:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 21836 states and 48403 transitions. [2021-03-10 22:26:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:46,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:46,366 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:46,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 22:26:46,571 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:46,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1178558949, now seen corresponding path program 38 times [2021-03-10 22:26:46,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:46,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541763368] [2021-03-10 22:26:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:46,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541763368] [2021-03-10 22:26:46,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710315906] [2021-03-10 22:26:46,673 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 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 22:26:46,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:46,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:46,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:46,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:46,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:26:46,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657057471] [2021-03-10 22:26:46,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:26:46,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:46,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:26:46,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:26:46,791 INFO L87 Difference]: Start difference. First operand 21836 states and 48403 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 22:26:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:47,057 INFO L93 Difference]: Finished difference Result 31481 states and 69778 transitions. [2021-03-10 22:26:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:26:47,057 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 56 [2021-03-10 22:26:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:47,114 INFO L225 Difference]: With dead ends: 31481 [2021-03-10 22:26:47,114 INFO L226 Difference]: Without dead ends: 31323 [2021-03-10 22:26:47,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:26:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-03-10 22:26:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 30212. [2021-03-10 22:26:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 30211 states have (on average 2.2320015888252622) internal successors, (67431), 30211 states have internal predecessors, (67431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 67431 transitions. [2021-03-10 22:26:47,702 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 67431 transitions. Word has length 56 [2021-03-10 22:26:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:47,702 INFO L480 AbstractCegarLoop]: Abstraction has 30212 states and 67431 transitions. [2021-03-10 22:26:47,702 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 22:26:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 67431 transitions. [2021-03-10 22:26:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:47,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:47,736 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:47,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:47,936 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:47,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash 153461775, now seen corresponding path program 39 times [2021-03-10 22:26:47,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:47,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523433417] [2021-03-10 22:26:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:47,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523433417] [2021-03-10 22:26:47,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211571828] [2021-03-10 22:26:47,970 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:48,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:26:48,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:48,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:48,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:48,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:48,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:48,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085238736] [2021-03-10 22:26:48,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:48,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:48,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:48,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:48,080 INFO L87 Difference]: Start difference. First operand 30212 states and 67431 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:48,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:48,271 INFO L93 Difference]: Finished difference Result 31139 states and 68850 transitions. [2021-03-10 22:26:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:26:48,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:26:48,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:48,328 INFO L225 Difference]: With dead ends: 31139 [2021-03-10 22:26:48,328 INFO L226 Difference]: Without dead ends: 31139 [2021-03-10 22:26:48,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31139 states. [2021-03-10 22:26:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31139 to 28244. [2021-03-10 22:26:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28244 states, 28243 states have (on average 2.2232411571008743) internal successors, (62791), 28243 states have internal predecessors, (62791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 62791 transitions. [2021-03-10 22:26:48,811 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 62791 transitions. Word has length 56 [2021-03-10 22:26:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:48,811 INFO L480 AbstractCegarLoop]: Abstraction has 28244 states and 62791 transitions. [2021-03-10 22:26:48,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 62791 transitions. [2021-03-10 22:26:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:48,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:48,843 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:49,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-10 22:26:49,044 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash 359936614, now seen corresponding path program 40 times [2021-03-10 22:26:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:49,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003921547] [2021-03-10 22:26:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:49,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003921547] [2021-03-10 22:26:49,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749139510] [2021-03-10 22:26:49,085 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 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 22:26:49,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:49,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:49,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:49,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:49,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:49,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:49,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842212627] [2021-03-10 22:26:49,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:49,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:49,202 INFO L87 Difference]: Start difference. First operand 28244 states and 62791 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:49,395 INFO L93 Difference]: Finished difference Result 29356 states and 64669 transitions. [2021-03-10 22:26:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:26:49,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:26:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:49,542 INFO L225 Difference]: With dead ends: 29356 [2021-03-10 22:26:49,543 INFO L226 Difference]: Without dead ends: 29352 [2021-03-10 22:26:49,543 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29352 states. [2021-03-10 22:26:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29352 to 27360. [2021-03-10 22:26:49,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27360 states, 27359 states have (on average 2.2246061625059395) internal successors, (60863), 27359 states have internal predecessors, (60863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 60863 transitions. [2021-03-10 22:26:49,976 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 60863 transitions. Word has length 56 [2021-03-10 22:26:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:49,976 INFO L480 AbstractCegarLoop]: Abstraction has 27360 states and 60863 transitions. [2021-03-10 22:26:49,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 60863 transitions. [2021-03-10 22:26:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:50,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:50,008 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:50,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:50,208 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1412824282, now seen corresponding path program 41 times [2021-03-10 22:26:50,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:50,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491716622] [2021-03-10 22:26:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:50,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491716622] [2021-03-10 22:26:50,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716637001] [2021-03-10 22:26:50,243 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 22:26:50,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:26:50,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:50,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:50,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:50,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:50,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:50,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135957852] [2021-03-10 22:26:50,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:50,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:50,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:50,354 INFO L87 Difference]: Start difference. First operand 27360 states and 60863 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:50,555 INFO L93 Difference]: Finished difference Result 35236 states and 77241 transitions. [2021-03-10 22:26:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:26:50,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:26:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:50,620 INFO L225 Difference]: With dead ends: 35236 [2021-03-10 22:26:50,620 INFO L226 Difference]: Without dead ends: 35236 [2021-03-10 22:26:50,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35236 states. [2021-03-10 22:26:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35236 to 31608. [2021-03-10 22:26:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31608 states, 31607 states have (on average 2.2330180023412534) internal successors, (70579), 31607 states have internal predecessors, (70579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:51,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 70579 transitions. [2021-03-10 22:26:51,186 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 70579 transitions. Word has length 56 [2021-03-10 22:26:51,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:51,186 INFO L480 AbstractCegarLoop]: Abstraction has 31608 states and 70579 transitions. [2021-03-10 22:26:51,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 70579 transitions. [2021-03-10 22:26:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:51,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:51,218 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:51,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:51,419 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:51,419 INFO L82 PathProgramCache]: Analyzing trace with hash -417869413, now seen corresponding path program 42 times [2021-03-10 22:26:51,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:51,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896615] [2021-03-10 22:26:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:51,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896615] [2021-03-10 22:26:51,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085999889] [2021-03-10 22:26:51,452 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:51,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:26:51,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:51,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:51,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:51,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:51,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289011597] [2021-03-10 22:26:51,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:51,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:51,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:51,560 INFO L87 Difference]: Start difference. First operand 31608 states and 70579 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:51,773 INFO L93 Difference]: Finished difference Result 34730 states and 77163 transitions. [2021-03-10 22:26:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:26:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:26:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:51,839 INFO L225 Difference]: With dead ends: 34730 [2021-03-10 22:26:51,839 INFO L226 Difference]: Without dead ends: 34724 [2021-03-10 22:26:51,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34724 states. [2021-03-10 22:26:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34724 to 33620. [2021-03-10 22:26:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33620 states, 33619 states have (on average 2.240013087837235) internal successors, (75307), 33619 states have internal predecessors, (75307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33620 states to 33620 states and 75307 transitions. [2021-03-10 22:26:52,508 INFO L78 Accepts]: Start accepts. Automaton has 33620 states and 75307 transitions. Word has length 56 [2021-03-10 22:26:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:52,508 INFO L480 AbstractCegarLoop]: Abstraction has 33620 states and 75307 transitions. [2021-03-10 22:26:52,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 33620 states and 75307 transitions. [2021-03-10 22:26:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:52,538 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:52,539 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:52,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 22:26:52,751 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash -113143793, now seen corresponding path program 43 times [2021-03-10 22:26:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:52,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796447774] [2021-03-10 22:26:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:52,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796447774] [2021-03-10 22:26:52,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381663757] [2021-03-10 22:26:52,784 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:52,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:52,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:52,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:52,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:52,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539333164] [2021-03-10 22:26:52,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:52,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:52,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:52,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:52,889 INFO L87 Difference]: Start difference. First operand 33620 states and 75307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:53,084 INFO L93 Difference]: Finished difference Result 35642 states and 78991 transitions. [2021-03-10 22:26:53,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:26:53,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:26:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:53,147 INFO L225 Difference]: With dead ends: 35642 [2021-03-10 22:26:53,147 INFO L226 Difference]: Without dead ends: 35640 [2021-03-10 22:26:53,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35640 states. [2021-03-10 22:26:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35640 to 33704. [2021-03-10 22:26:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33704 states, 33703 states have (on average 2.237159896745097) internal successors, (75399), 33703 states have internal predecessors, (75399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33704 states to 33704 states and 75399 transitions. [2021-03-10 22:26:53,705 INFO L78 Accepts]: Start accepts. Automaton has 33704 states and 75399 transitions. Word has length 56 [2021-03-10 22:26:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:53,705 INFO L480 AbstractCegarLoop]: Abstraction has 33704 states and 75399 transitions. [2021-03-10 22:26:53,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 33704 states and 75399 transitions. [2021-03-10 22:26:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:53,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:53,739 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:53,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:53,940 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash 93331046, now seen corresponding path program 44 times [2021-03-10 22:26:53,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:53,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971009794] [2021-03-10 22:26:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:53,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971009794] [2021-03-10 22:26:53,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796962161] [2021-03-10 22:26:53,971 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:53,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:26:53,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:53,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:53,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:54,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:54,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:54,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988521708] [2021-03-10 22:26:54,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:54,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:54,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:54,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:54,076 INFO L87 Difference]: Start difference. First operand 33704 states and 75399 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:54,297 INFO L93 Difference]: Finished difference Result 35791 states and 78899 transitions. [2021-03-10 22:26:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:26:54,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:26:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:54,361 INFO L225 Difference]: With dead ends: 35791 [2021-03-10 22:26:54,361 INFO L226 Difference]: Without dead ends: 35723 [2021-03-10 22:26:54,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35723 states. [2021-03-10 22:26:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35723 to 33624. [2021-03-10 22:26:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33624 states, 33623 states have (on average 2.2343931237545727) internal successors, (75127), 33623 states have internal predecessors, (75127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33624 states to 33624 states and 75127 transitions. [2021-03-10 22:26:55,104 INFO L78 Accepts]: Start accepts. Automaton has 33624 states and 75127 transitions. Word has length 56 [2021-03-10 22:26:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:55,105 INFO L480 AbstractCegarLoop]: Abstraction has 33624 states and 75127 transitions. [2021-03-10 22:26:55,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:26:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 33624 states and 75127 transitions. [2021-03-10 22:26:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:55,141 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:55,141 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:55,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 22:26:55,355 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:55,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:55,356 INFO L82 PathProgramCache]: Analyzing trace with hash 277060133, now seen corresponding path program 45 times [2021-03-10 22:26:55,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:55,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642208383] [2021-03-10 22:26:55,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:55,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642208383] [2021-03-10 22:26:55,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079323632] [2021-03-10 22:26:55,393 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:55,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:26:55,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:55,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:55,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:55,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:55,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:26:55,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467076297] [2021-03-10 22:26:55,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:26:55,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:55,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:26:55,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:55,516 INFO L87 Difference]: Start difference. First operand 33624 states and 75127 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 22:26:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:55,750 INFO L93 Difference]: Finished difference Result 35258 states and 78007 transitions. [2021-03-10 22:26:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:26:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-03-10 22:26:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:55,815 INFO L225 Difference]: With dead ends: 35258 [2021-03-10 22:26:55,815 INFO L226 Difference]: Without dead ends: 35256 [2021-03-10 22:26:55,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:26:55,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35256 states. [2021-03-10 22:26:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35256 to 33208. [2021-03-10 22:26:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2308248260908843) internal successors, (74079), 33207 states have internal predecessors, (74079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74079 transitions. [2021-03-10 22:26:56,657 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74079 transitions. Word has length 56 [2021-03-10 22:26:56,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:56,657 INFO L480 AbstractCegarLoop]: Abstraction has 33208 states and 74079 transitions. [2021-03-10 22:26:56,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 22:26:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74079 transitions. [2021-03-10 22:26:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:56,686 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:56,686 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:56,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 22:26:56,886 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:56,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:56,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1851558476, now seen corresponding path program 46 times [2021-03-10 22:26:56,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:56,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758482813] [2021-03-10 22:26:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:56,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758482813] [2021-03-10 22:26:56,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523835700] [2021-03-10 22:26:56,928 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 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 22:26:56,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:26:56,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:56,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:56,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:26:57,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:57,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:26:57,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202334401] [2021-03-10 22:26:57,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:26:57,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:26:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:26:57,123 INFO L87 Difference]: Start difference. First operand 33208 states and 74079 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 22:26:57,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:57,349 INFO L93 Difference]: Finished difference Result 34889 states and 76950 transitions. [2021-03-10 22:26:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:26:57,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-03-10 22:26:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:57,410 INFO L225 Difference]: With dead ends: 34889 [2021-03-10 22:26:57,411 INFO L226 Difference]: Without dead ends: 34865 [2021-03-10 22:26:57,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:26:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34865 states. [2021-03-10 22:26:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34865 to 33208. [2021-03-10 22:26:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2297407173186374) internal successors, (74043), 33207 states have internal predecessors, (74043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74043 transitions. [2021-03-10 22:26:58,109 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74043 transitions. Word has length 56 [2021-03-10 22:26:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:58,109 INFO L480 AbstractCegarLoop]: Abstraction has 33208 states and 74043 transitions. [2021-03-10 22:26:58,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 22:26:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74043 transitions. [2021-03-10 22:26:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:58,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:58,143 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:58,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 22:26:58,344 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:58,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:58,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1633200633, now seen corresponding path program 47 times [2021-03-10 22:26:58,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:58,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634770037] [2021-03-10 22:26:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:26:58,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634770037] [2021-03-10 22:26:58,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258748088] [2021-03-10 22:26:58,378 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 22:26:58,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:26:58,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:58,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:26:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:26:58,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:58,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:58,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649586928] [2021-03-10 22:26:58,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:58,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:58,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:58,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:58,510 INFO L87 Difference]: Start difference. First operand 33208 states and 74043 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 22:26:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:26:58,728 INFO L93 Difference]: Finished difference Result 35848 states and 79532 transitions. [2021-03-10 22:26:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:26:58,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 56 [2021-03-10 22:26:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:26:58,793 INFO L225 Difference]: With dead ends: 35848 [2021-03-10 22:26:58,793 INFO L226 Difference]: Without dead ends: 35812 [2021-03-10 22:26:58,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:26:58,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-03-10 22:26:59,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 32944. [2021-03-10 22:26:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32944 states, 32943 states have (on average 2.231581823149076) internal successors, (73515), 32943 states have internal predecessors, (73515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:26:59,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32944 states to 32944 states and 73515 transitions. [2021-03-10 22:26:59,461 INFO L78 Accepts]: Start accepts. Automaton has 32944 states and 73515 transitions. Word has length 56 [2021-03-10 22:26:59,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:26:59,461 INFO L480 AbstractCegarLoop]: Abstraction has 32944 states and 73515 transitions. [2021-03-10 22:26:59,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 22:26:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 32944 states and 73515 transitions. [2021-03-10 22:26:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:26:59,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:26:59,493 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:26:59,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 22:26:59,693 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:26:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:26:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash -916831962, now seen corresponding path program 48 times [2021-03-10 22:26:59,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:26:59,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932290791] [2021-03-10 22:26:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:26:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:26:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:59,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932290791] [2021-03-10 22:26:59,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453716196] [2021-03-10 22:26:59,724 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:26:59,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:26:59,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:26:59,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:26:59,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:26:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:26:59,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:26:59,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:26:59,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955934426] [2021-03-10 22:26:59,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:26:59,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:26:59,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:26:59,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:26:59,838 INFO L87 Difference]: Start difference. First operand 32944 states and 73515 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:00,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:00,214 INFO L93 Difference]: Finished difference Result 40718 states and 89870 transitions. [2021-03-10 22:27:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:27:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:00,306 INFO L225 Difference]: With dead ends: 40718 [2021-03-10 22:27:00,307 INFO L226 Difference]: Without dead ends: 40718 [2021-03-10 22:27:00,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:27:00,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2021-03-10 22:27:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 37152. [2021-03-10 22:27:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37152 states, 37151 states have (on average 2.2417431563080403) internal successors, (83283), 37151 states have internal predecessors, (83283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37152 states to 37152 states and 83283 transitions. [2021-03-10 22:27:01,102 INFO L78 Accepts]: Start accepts. Automaton has 37152 states and 83283 transitions. Word has length 56 [2021-03-10 22:27:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:01,102 INFO L480 AbstractCegarLoop]: Abstraction has 37152 states and 83283 transitions. [2021-03-10 22:27:01,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 37152 states and 83283 transitions. [2021-03-10 22:27:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:01,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:01,139 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:01,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:01,355 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash 78122907, now seen corresponding path program 49 times [2021-03-10 22:27:01,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:01,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199796927] [2021-03-10 22:27:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:01,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199796927] [2021-03-10 22:27:01,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64793050] [2021-03-10 22:27:01,387 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 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 22:27:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:01,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:01,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:27:01,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268703974] [2021-03-10 22:27:01,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:27:01,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:01,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:27:01,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:27:01,498 INFO L87 Difference]: Start difference. First operand 37152 states and 83283 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:01,754 INFO L93 Difference]: Finished difference Result 40524 states and 90274 transitions. [2021-03-10 22:27:01,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:01,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:27:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:01,834 INFO L225 Difference]: With dead ends: 40524 [2021-03-10 22:27:01,834 INFO L226 Difference]: Without dead ends: 40488 [2021-03-10 22:27:01,834 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:27:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40488 states. [2021-03-10 22:27:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40488 to 36712. [2021-03-10 22:27:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36712 states, 36711 states have (on average 2.242025550924791) internal successors, (82307), 36711 states have internal predecessors, (82307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36712 states to 36712 states and 82307 transitions. [2021-03-10 22:27:02,657 INFO L78 Accepts]: Start accepts. Automaton has 36712 states and 82307 transitions. Word has length 56 [2021-03-10 22:27:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:02,657 INFO L480 AbstractCegarLoop]: Abstraction has 36712 states and 82307 transitions. [2021-03-10 22:27:02,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 36712 states and 82307 transitions. [2021-03-10 22:27:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:02,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:02,691 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:02,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:02,892 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:02,893 INFO L82 PathProgramCache]: Analyzing trace with hash 382848527, now seen corresponding path program 50 times [2021-03-10 22:27:02,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:02,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464390147] [2021-03-10 22:27:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:02,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464390147] [2021-03-10 22:27:02,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466057730] [2021-03-10 22:27:02,922 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:02,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:27:02,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:02,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:02,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:03,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:03,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:27:03,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647481912] [2021-03-10 22:27:03,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:27:03,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:03,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:27:03,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:27:03,036 INFO L87 Difference]: Start difference. First operand 36712 states and 82307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:03,384 INFO L93 Difference]: Finished difference Result 39280 states and 87158 transitions. [2021-03-10 22:27:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:03,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:27:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:03,463 INFO L225 Difference]: With dead ends: 39280 [2021-03-10 22:27:03,463 INFO L226 Difference]: Without dead ends: 39278 [2021-03-10 22:27:03,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:27:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39278 states. [2021-03-10 22:27:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39278 to 36836. [2021-03-10 22:27:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36836 states, 36835 states have (on average 2.2415365820551107) internal successors, (82567), 36835 states have internal predecessors, (82567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36836 states to 36836 states and 82567 transitions. [2021-03-10 22:27:04,253 INFO L78 Accepts]: Start accepts. Automaton has 36836 states and 82567 transitions. Word has length 56 [2021-03-10 22:27:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:04,253 INFO L480 AbstractCegarLoop]: Abstraction has 36836 states and 82567 transitions. [2021-03-10 22:27:04,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 36836 states and 82567 transitions. [2021-03-10 22:27:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:04,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:04,288 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:04,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:04,489 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash 589323366, now seen corresponding path program 51 times [2021-03-10 22:27:04,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:04,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311139968] [2021-03-10 22:27:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:04,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311139968] [2021-03-10 22:27:04,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206263336] [2021-03-10 22:27:04,526 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 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 22:27:04,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:27:04,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:04,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:27:04,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-03-10 22:27:04,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:04,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 22:27:04,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900913143] [2021-03-10 22:27:04,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:27:04,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:04,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:27:04,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:27:04,676 INFO L87 Difference]: Start difference. First operand 36836 states and 82567 transitions. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:05,712 INFO L93 Difference]: Finished difference Result 65704 states and 142418 transitions. [2021-03-10 22:27:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-10 22:27:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have 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 22:27:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:05,842 INFO L225 Difference]: With dead ends: 65704 [2021-03-10 22:27:05,842 INFO L226 Difference]: Without dead ends: 65560 [2021-03-10 22:27:05,842 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 546.3ms TimeCoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 22:27:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65560 states. [2021-03-10 22:27:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65560 to 50470. [2021-03-10 22:27:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50470 states, 50469 states have (on average 2.2044225167924867) internal successors, (111255), 50469 states have internal predecessors, (111255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50470 states to 50470 states and 111255 transitions. [2021-03-10 22:27:07,107 INFO L78 Accepts]: Start accepts. Automaton has 50470 states and 111255 transitions. Word has length 56 [2021-03-10 22:27:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:07,107 INFO L480 AbstractCegarLoop]: Abstraction has 50470 states and 111255 transitions. [2021-03-10 22:27:07,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 50470 states and 111255 transitions. [2021-03-10 22:27:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:07,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:07,149 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:07,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 22:27:07,350 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:07,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:07,350 INFO L82 PathProgramCache]: Analyzing trace with hash 773052453, now seen corresponding path program 52 times [2021-03-10 22:27:07,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:07,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112239338] [2021-03-10 22:27:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:07,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112239338] [2021-03-10 22:27:07,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753542310] [2021-03-10 22:27:07,392 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 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 22:27:07,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:27:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:07,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:07,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:07,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:07,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703577563] [2021-03-10 22:27:07,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:07,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:07,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:07,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:07,488 INFO L87 Difference]: Start difference. First operand 50470 states and 111255 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 22:27:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:07,792 INFO L93 Difference]: Finished difference Result 57450 states and 125218 transitions. [2021-03-10 22:27:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:27:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-03-10 22:27:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:08,257 INFO L225 Difference]: With dead ends: 57450 [2021-03-10 22:27:08,257 INFO L226 Difference]: Without dead ends: 57432 [2021-03-10 22:27:08,258 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:27:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57432 states. [2021-03-10 22:27:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57432 to 50730. [2021-03-10 22:27:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50730 states, 50729 states have (on average 2.2019554889708055) internal successors, (111703), 50729 states have internal predecessors, (111703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50730 states to 50730 states and 111703 transitions. [2021-03-10 22:27:09,394 INFO L78 Accepts]: Start accepts. Automaton has 50730 states and 111703 transitions. Word has length 56 [2021-03-10 22:27:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:09,394 INFO L480 AbstractCegarLoop]: Abstraction has 50730 states and 111703 transitions. [2021-03-10 22:27:09,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 22:27:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 50730 states and 111703 transitions. [2021-03-10 22:27:09,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:09,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:09,435 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:09,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:09,636 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:09,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2069049913, now seen corresponding path program 53 times [2021-03-10 22:27:09,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:09,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198971976] [2021-03-10 22:27:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:09,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198971976] [2021-03-10 22:27:09,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640394781] [2021-03-10 22:27:09,681 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 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 22:27:09,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:27:09,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:09,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:09,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:27:09,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741141649] [2021-03-10 22:27:09,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:27:09,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:09,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:27:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:27:09,805 INFO L87 Difference]: Start difference. First operand 50730 states and 111703 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 22:27:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:10,105 INFO L93 Difference]: Finished difference Result 53406 states and 116710 transitions. [2021-03-10 22:27:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:10,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 56 [2021-03-10 22:27:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:10,213 INFO L225 Difference]: With dead ends: 53406 [2021-03-10 22:27:10,213 INFO L226 Difference]: Without dead ends: 53388 [2021-03-10 22:27:10,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:27:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53388 states. [2021-03-10 22:27:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53388 to 45578. [2021-03-10 22:27:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45578 states, 45577 states have (on average 2.197402198477302) internal successors, (100151), 45577 states have internal predecessors, (100151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45578 states to 45578 states and 100151 transitions. [2021-03-10 22:27:11,479 INFO L78 Accepts]: Start accepts. Automaton has 45578 states and 100151 transitions. Word has length 56 [2021-03-10 22:27:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:11,479 INFO L480 AbstractCegarLoop]: Abstraction has 45578 states and 100151 transitions. [2021-03-10 22:27:11,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 22:27:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 45578 states and 100151 transitions. [2021-03-10 22:27:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:11,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:11,513 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:11,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 22:27:11,715 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:11,716 INFO L82 PathProgramCache]: Analyzing trace with hash -361343013, now seen corresponding path program 54 times [2021-03-10 22:27:11,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:11,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697658061] [2021-03-10 22:27:11,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:27:11,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697658061] [2021-03-10 22:27:11,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863518832] [2021-03-10 22:27:11,751 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 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 22:27:11,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:27:11,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:11,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:27:11,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:11,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:11,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17617433] [2021-03-10 22:27:11,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:11,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:11,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:11,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:11,857 INFO L87 Difference]: Start difference. First operand 45578 states and 100151 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 22:27:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:12,117 INFO L93 Difference]: Finished difference Result 49711 states and 108806 transitions. [2021-03-10 22:27:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 56 [2021-03-10 22:27:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:12,214 INFO L225 Difference]: With dead ends: 49711 [2021-03-10 22:27:12,214 INFO L226 Difference]: Without dead ends: 49645 [2021-03-10 22:27:12,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:27:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49645 states. [2021-03-10 22:27:13,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49645 to 48590. [2021-03-10 22:27:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48590 states, 48589 states have (on average 2.2018769680380332) internal successors, (106987), 48589 states have internal predecessors, (106987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48590 states to 48590 states and 106987 transitions. [2021-03-10 22:27:13,216 INFO L78 Accepts]: Start accepts. Automaton has 48590 states and 106987 transitions. Word has length 56 [2021-03-10 22:27:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:13,216 INFO L480 AbstractCegarLoop]: Abstraction has 48590 states and 106987 transitions. [2021-03-10 22:27:13,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 22:27:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 48590 states and 106987 transitions. [2021-03-10 22:27:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:13,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:13,253 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:13,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:13,454 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:13,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:13,454 INFO L82 PathProgramCache]: Analyzing trace with hash -378550939, now seen corresponding path program 55 times [2021-03-10 22:27:13,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:13,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823659845] [2021-03-10 22:27:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:27:13,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823659845] [2021-03-10 22:27:13,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320007057] [2021-03-10 22:27:13,489 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:13,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:13,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:27:13,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:13,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:27:13,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583207739] [2021-03-10 22:27:13,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:27:13,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:13,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:27:13,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:27:13,595 INFO L87 Difference]: Start difference. First operand 48590 states and 106987 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 22:27:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:13,868 INFO L93 Difference]: Finished difference Result 51903 states and 113860 transitions. [2021-03-10 22:27:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:27:13,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 56 [2021-03-10 22:27:13,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:13,975 INFO L225 Difference]: With dead ends: 51903 [2021-03-10 22:27:13,975 INFO L226 Difference]: Without dead ends: 51867 [2021-03-10 22:27:13,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:27:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51867 states. [2021-03-10 22:27:14,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51867 to 50962. [2021-03-10 22:27:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 2.2042542336296385) internal successors, (112331), 50961 states have internal predecessors, (112331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 112331 transitions. [2021-03-10 22:27:14,941 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 112331 transitions. Word has length 56 [2021-03-10 22:27:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:14,941 INFO L480 AbstractCegarLoop]: Abstraction has 50962 states and 112331 transitions. [2021-03-10 22:27:14,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 22:27:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 112331 transitions. [2021-03-10 22:27:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:14,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:14,981 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:15,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 22:27:15,182 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:15,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1368047205, now seen corresponding path program 56 times [2021-03-10 22:27:15,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:15,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651443754] [2021-03-10 22:27:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:15,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651443754] [2021-03-10 22:27:15,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857132767] [2021-03-10 22:27:15,480 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 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 22:27:15,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:27:15,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:15,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:15,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:15,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:27:15,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937868337] [2021-03-10 22:27:15,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:27:15,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:15,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:27:15,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:27:15,616 INFO L87 Difference]: Start difference. First operand 50962 states and 112331 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:15,896 INFO L93 Difference]: Finished difference Result 54564 states and 119631 transitions. [2021-03-10 22:27:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:27:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:16,005 INFO L225 Difference]: With dead ends: 54564 [2021-03-10 22:27:16,005 INFO L226 Difference]: Without dead ends: 54522 [2021-03-10 22:27:16,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:27:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2021-03-10 22:27:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 50922. [2021-03-10 22:27:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50922 states, 50921 states have (on average 2.2044932346183304) internal successors, (112255), 50921 states have internal predecessors, (112255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50922 states to 50922 states and 112255 transitions. [2021-03-10 22:27:17,047 INFO L78 Accepts]: Start accepts. Automaton has 50922 states and 112255 transitions. Word has length 56 [2021-03-10 22:27:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:17,047 INFO L480 AbstractCegarLoop]: Abstraction has 50922 states and 112255 transitions. [2021-03-10 22:27:17,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:17,048 INFO L276 IsEmpty]: Start isEmpty. Operand 50922 states and 112255 transitions. [2021-03-10 22:27:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:17,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:17,088 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:17,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:17,289 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:17,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1063321585, now seen corresponding path program 57 times [2021-03-10 22:27:17,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:17,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719925109] [2021-03-10 22:27:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:17,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719925109] [2021-03-10 22:27:17,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987000420] [2021-03-10 22:27:17,319 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 22:27:17,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:27:17,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:17,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:17,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:17,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:27:17,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396425820] [2021-03-10 22:27:17,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:27:17,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:17,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:27:17,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:27:17,423 INFO L87 Difference]: Start difference. First operand 50922 states and 112255 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:17,694 INFO L93 Difference]: Finished difference Result 54000 states and 117977 transitions. [2021-03-10 22:27:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:27:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:17,797 INFO L225 Difference]: With dead ends: 54000 [2021-03-10 22:27:17,798 INFO L226 Difference]: Without dead ends: 53998 [2021-03-10 22:27:17,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:27:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53998 states. [2021-03-10 22:27:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53998 to 51006. [2021-03-10 22:27:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51006 states, 51005 states have (on average 2.203842760513675) internal successors, (112407), 51005 states have internal predecessors, (112407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51006 states to 51006 states and 112407 transitions. [2021-03-10 22:27:18,935 INFO L78 Accepts]: Start accepts. Automaton has 51006 states and 112407 transitions. Word has length 56 [2021-03-10 22:27:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:18,935 INFO L480 AbstractCegarLoop]: Abstraction has 51006 states and 112407 transitions. [2021-03-10 22:27:18,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:18,935 INFO L276 IsEmpty]: Start isEmpty. Operand 51006 states and 112407 transitions. [2021-03-10 22:27:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:18,979 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:18,979 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:19,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 22:27:19,180 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:19,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:19,180 INFO L82 PathProgramCache]: Analyzing trace with hash -673117659, now seen corresponding path program 58 times [2021-03-10 22:27:19,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:19,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469729922] [2021-03-10 22:27:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:19,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469729922] [2021-03-10 22:27:19,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088868335] [2021-03-10 22:27:19,219 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 22:27:19,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:27:19,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:19,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:19,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:19,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:19,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:19,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374842313] [2021-03-10 22:27:19,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:19,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:19,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:19,326 INFO L87 Difference]: Start difference. First operand 51006 states and 112407 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 22:27:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:19,912 INFO L93 Difference]: Finished difference Result 57784 states and 125981 transitions. [2021-03-10 22:27:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:27:19,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-03-10 22:27:19,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:20,030 INFO L225 Difference]: With dead ends: 57784 [2021-03-10 22:27:20,030 INFO L226 Difference]: Without dead ends: 57782 [2021-03-10 22:27:20,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:27:20,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57782 states. [2021-03-10 22:27:20,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57782 to 51426. [2021-03-10 22:27:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51426 states, 51425 states have (on average 2.202566844919786) internal successors, (113267), 51425 states have internal predecessors, (113267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51426 states to 51426 states and 113267 transitions. [2021-03-10 22:27:21,236 INFO L78 Accepts]: Start accepts. Automaton has 51426 states and 113267 transitions. Word has length 56 [2021-03-10 22:27:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:21,236 INFO L480 AbstractCegarLoop]: Abstraction has 51426 states and 113267 transitions. [2021-03-10 22:27:21,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 22:27:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand 51426 states and 113267 transitions. [2021-03-10 22:27:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:21,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:21,274 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:21,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-03-10 22:27:21,474 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:21,475 INFO L82 PathProgramCache]: Analyzing trace with hash 779747271, now seen corresponding path program 59 times [2021-03-10 22:27:21,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:21,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473121509] [2021-03-10 22:27:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:21,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473121509] [2021-03-10 22:27:21,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280145479] [2021-03-10 22:27:21,526 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 22:27:21,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:27:21,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:21,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:21,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:21,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:21,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:27:21,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670305585] [2021-03-10 22:27:21,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:27:21,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:21,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:27:21,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:27:21,627 INFO L87 Difference]: Start difference. First operand 51426 states and 113267 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 22:27:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:21,965 INFO L93 Difference]: Finished difference Result 56504 states and 123265 transitions. [2021-03-10 22:27:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:27:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 56 [2021-03-10 22:27:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:22,079 INFO L225 Difference]: With dead ends: 56504 [2021-03-10 22:27:22,079 INFO L226 Difference]: Without dead ends: 56502 [2021-03-10 22:27:22,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:27:22,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56502 states. [2021-03-10 22:27:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56502 to 51506. [2021-03-10 22:27:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51506 states, 51505 states have (on average 2.2005436365401416) internal successors, (113339), 51505 states have internal predecessors, (113339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51506 states to 51506 states and 113339 transitions. [2021-03-10 22:27:23,115 INFO L78 Accepts]: Start accepts. Automaton has 51506 states and 113339 transitions. Word has length 56 [2021-03-10 22:27:23,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:23,115 INFO L480 AbstractCegarLoop]: Abstraction has 51506 states and 113339 transitions. [2021-03-10 22:27:23,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 22:27:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 51506 states and 113339 transitions. [2021-03-10 22:27:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:23,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:23,155 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:23,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:23,371 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1081723995, now seen corresponding path program 60 times [2021-03-10 22:27:23,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:23,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867996274] [2021-03-10 22:27:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:23,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867996274] [2021-03-10 22:27:23,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745172375] [2021-03-10 22:27:23,418 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 22:27:23,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 22:27:23,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:23,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:23,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:27:23,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522165403] [2021-03-10 22:27:23,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:27:23,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:23,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:27:23,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:27:23,542 INFO L87 Difference]: Start difference. First operand 51506 states and 113339 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 22:27:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:23,871 INFO L93 Difference]: Finished difference Result 53832 states and 117559 transitions. [2021-03-10 22:27:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:23,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 56 [2021-03-10 22:27:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:23,977 INFO L225 Difference]: With dead ends: 53832 [2021-03-10 22:27:23,977 INFO L226 Difference]: Without dead ends: 53830 [2021-03-10 22:27:23,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:27:24,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53830 states. [2021-03-10 22:27:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53830 to 49874. [2021-03-10 22:27:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49874 states, 49873 states have (on average 2.2004892426763982) internal successors, (109745), 49873 states have internal predecessors, (109745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49874 states to 49874 states and 109745 transitions. [2021-03-10 22:27:25,096 INFO L78 Accepts]: Start accepts. Automaton has 49874 states and 109745 transitions. Word has length 56 [2021-03-10 22:27:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:25,096 INFO L480 AbstractCegarLoop]: Abstraction has 49874 states and 109745 transitions. [2021-03-10 22:27:25,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 22:27:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 49874 states and 109745 transitions. [2021-03-10 22:27:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:25,137 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:25,137 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:25,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:25,338 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:25,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2020283719, now seen corresponding path program 61 times [2021-03-10 22:27:25,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:25,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499845262] [2021-03-10 22:27:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:27:25,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499845262] [2021-03-10 22:27:25,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896816809] [2021-03-10 22:27:25,389 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 22:27:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:25,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:25,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:27:25,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:25,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:27:25,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819753202] [2021-03-10 22:27:25,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:27:25,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:27:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:27:25,501 INFO L87 Difference]: Start difference. First operand 49874 states and 109745 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 22:27:25,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:25,857 INFO L93 Difference]: Finished difference Result 51331 states and 112086 transitions. [2021-03-10 22:27:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:27:25,858 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 56 [2021-03-10 22:27:25,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:25,958 INFO L225 Difference]: With dead ends: 51331 [2021-03-10 22:27:25,959 INFO L226 Difference]: Without dead ends: 51235 [2021-03-10 22:27:25,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:27:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51235 states. [2021-03-10 22:27:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51235 to 47230. [2021-03-10 22:27:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.193673378644477) internal successors, (103605), 47229 states have internal predecessors, (103605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103605 transitions. [2021-03-10 22:27:26,947 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103605 transitions. Word has length 56 [2021-03-10 22:27:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:26,947 INFO L480 AbstractCegarLoop]: Abstraction has 47230 states and 103605 transitions. [2021-03-10 22:27:26,947 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 22:27:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103605 transitions. [2021-03-10 22:27:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:26,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:26,988 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:27,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-10 22:27:27,188 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash 517101275, now seen corresponding path program 62 times [2021-03-10 22:27:27,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:27,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103061656] [2021-03-10 22:27:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:27:27,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103061656] [2021-03-10 22:27:27,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840567902] [2021-03-10 22:27:27,228 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 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 22:27:27,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:27:27,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:27,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:27,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:27:27,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:27,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:27:27,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958976444] [2021-03-10 22:27:27,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:27:27,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:27,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:27:27,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:27:27,326 INFO L87 Difference]: Start difference. First operand 47230 states and 103605 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 22:27:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:27,792 INFO L93 Difference]: Finished difference Result 48435 states and 105506 transitions. [2021-03-10 22:27:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:27:27,793 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 56 [2021-03-10 22:27:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:27,875 INFO L225 Difference]: With dead ends: 48435 [2021-03-10 22:27:27,876 INFO L226 Difference]: Without dead ends: 48369 [2021-03-10 22:27:27,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:27:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2021-03-10 22:27:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 47230. [2021-03-10 22:27:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1912172605814226) internal successors, (103489), 47229 states have internal predecessors, (103489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103489 transitions. [2021-03-10 22:27:28,662 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103489 transitions. Word has length 56 [2021-03-10 22:27:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:28,662 INFO L480 AbstractCegarLoop]: Abstraction has 47230 states and 103489 transitions. [2021-03-10 22:27:28,662 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 22:27:28,662 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103489 transitions. [2021-03-10 22:27:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:28,701 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:28,701 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:28,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:28,901 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:28,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:28,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1809607417, now seen corresponding path program 63 times [2021-03-10 22:27:28,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:28,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278198853] [2021-03-10 22:27:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:27:28,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278198853] [2021-03-10 22:27:28,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560641280] [2021-03-10 22:27:28,937 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 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 22:27:28,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:27:28,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:28,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:28,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:27:29,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:29,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:29,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222462123] [2021-03-10 22:27:29,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:29,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:29,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:29,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:29,225 INFO L87 Difference]: Start difference. First operand 47230 states and 103489 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 22:27:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:29,475 INFO L93 Difference]: Finished difference Result 48187 states and 104966 transitions. [2021-03-10 22:27:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:27:29,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 22:27:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:29,559 INFO L225 Difference]: With dead ends: 48187 [2021-03-10 22:27:29,559 INFO L226 Difference]: Without dead ends: 48151 [2021-03-10 22:27:29,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:27:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48151 states. [2021-03-10 22:27:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48151 to 47230. [2021-03-10 22:27:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1896927735078022) internal successors, (103417), 47229 states have internal predecessors, (103417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103417 transitions. [2021-03-10 22:27:30,665 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103417 transitions. Word has length 56 [2021-03-10 22:27:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:30,665 INFO L480 AbstractCegarLoop]: Abstraction has 47230 states and 103417 transitions. [2021-03-10 22:27:30,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 22:27:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103417 transitions. [2021-03-10 22:27:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:30,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:30,710 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:30,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-03-10 22:27:30,915 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:30,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2068840347, now seen corresponding path program 64 times [2021-03-10 22:27:30,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:30,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838010070] [2021-03-10 22:27:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:30,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838010070] [2021-03-10 22:27:30,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557109232] [2021-03-10 22:27:30,949 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 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 22:27:30,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:27:30,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:30,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:31,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:31,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:27:31,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185846849] [2021-03-10 22:27:31,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:27:31,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:31,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:27:31,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:27:31,058 INFO L87 Difference]: Start difference. First operand 47230 states and 103417 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:31,374 INFO L93 Difference]: Finished difference Result 51250 states and 111816 transitions. [2021-03-10 22:27:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:27:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:31,483 INFO L225 Difference]: With dead ends: 51250 [2021-03-10 22:27:31,484 INFO L226 Difference]: Without dead ends: 51244 [2021-03-10 22:27:31,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:27:31,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51244 states. [2021-03-10 22:27:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51244 to 50262. [2021-03-10 22:27:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50262 states, 50261 states have (on average 2.194723543104992) internal successors, (110309), 50261 states have internal predecessors, (110309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50262 states to 50262 states and 110309 transitions. [2021-03-10 22:27:32,734 INFO L78 Accepts]: Start accepts. Automaton has 50262 states and 110309 transitions. Word has length 56 [2021-03-10 22:27:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:32,734 INFO L480 AbstractCegarLoop]: Abstraction has 50262 states and 110309 transitions. [2021-03-10 22:27:32,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:32,735 INFO L276 IsEmpty]: Start isEmpty. Operand 50262 states and 110309 transitions. [2021-03-10 22:27:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:32,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:32,780 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:32,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:32,981 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:32,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:32,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1921401329, now seen corresponding path program 65 times [2021-03-10 22:27:32,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:32,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307825562] [2021-03-10 22:27:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:33,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307825562] [2021-03-10 22:27:33,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949692317] [2021-03-10 22:27:33,017 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:27:33,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:27:33,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:33,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:33,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:33,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:33,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:27:33,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102723669] [2021-03-10 22:27:33,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:27:33,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:33,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:27:33,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:27:33,123 INFO L87 Difference]: Start difference. First operand 50262 states and 110309 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:33,387 INFO L93 Difference]: Finished difference Result 52650 states and 114688 transitions. [2021-03-10 22:27:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:33,387 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-03-10 22:27:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:33,494 INFO L225 Difference]: With dead ends: 52650 [2021-03-10 22:27:33,494 INFO L226 Difference]: Without dead ends: 52650 [2021-03-10 22:27:33,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:27:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52650 states. [2021-03-10 22:27:34,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52650 to 50294. [2021-03-10 22:27:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50294 states, 50293 states have (on average 2.1945996460740065) internal successors, (110373), 50293 states have internal predecessors, (110373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50294 states to 50294 states and 110373 transitions. [2021-03-10 22:27:34,663 INFO L78 Accepts]: Start accepts. Automaton has 50294 states and 110373 transitions. Word has length 56 [2021-03-10 22:27:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:34,663 INFO L480 AbstractCegarLoop]: Abstraction has 50294 states and 110373 transitions. [2021-03-10 22:27:34,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 22:27:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 50294 states and 110373 transitions. [2021-03-10 22:27:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:34,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:34,705 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:34,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-10 22:27:34,905 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:34,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:34,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1531197403, now seen corresponding path program 66 times [2021-03-10 22:27:34,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:34,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600705596] [2021-03-10 22:27:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:34,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600705596] [2021-03-10 22:27:34,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990004944] [2021-03-10 22:27:34,943 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 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 22:27:34,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 22:27:34,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:34,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:35,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:35,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:35,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486481143] [2021-03-10 22:27:35,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:35,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:35,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:35,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:35,064 INFO L87 Difference]: Start difference. First operand 50294 states and 110373 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 22:27:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:35,372 INFO L93 Difference]: Finished difference Result 56418 states and 122592 transitions. [2021-03-10 22:27:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:27:35,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-03-10 22:27:35,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:35,482 INFO L225 Difference]: With dead ends: 56418 [2021-03-10 22:27:35,482 INFO L226 Difference]: Without dead ends: 56418 [2021-03-10 22:27:35,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:27:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2021-03-10 22:27:36,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 50454. [2021-03-10 22:27:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50454 states, 50453 states have (on average 2.193982518383446) internal successors, (110693), 50453 states have internal predecessors, (110693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50454 states to 50454 states and 110693 transitions. [2021-03-10 22:27:36,627 INFO L78 Accepts]: Start accepts. Automaton has 50454 states and 110693 transitions. Word has length 56 [2021-03-10 22:27:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:36,627 INFO L480 AbstractCegarLoop]: Abstraction has 50454 states and 110693 transitions. [2021-03-10 22:27:36,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 22:27:36,627 INFO L276 IsEmpty]: Start isEmpty. Operand 50454 states and 110693 transitions. [2021-03-10 22:27:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:36,670 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:36,670 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:36,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:36,875 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:36,876 INFO L82 PathProgramCache]: Analyzing trace with hash -78332473, now seen corresponding path program 67 times [2021-03-10 22:27:36,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:36,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983260496] [2021-03-10 22:27:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:36,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983260496] [2021-03-10 22:27:36,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933479920] [2021-03-10 22:27:36,919 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 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 22:27:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:36,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:36,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:37,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:37,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:27:37,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521152258] [2021-03-10 22:27:37,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:27:37,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:37,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:27:37,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:27:37,029 INFO L87 Difference]: Start difference. First operand 50454 states and 110693 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 22:27:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:37,370 INFO L93 Difference]: Finished difference Result 56662 states and 123166 transitions. [2021-03-10 22:27:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:27:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 56 [2021-03-10 22:27:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:37,477 INFO L225 Difference]: With dead ends: 56662 [2021-03-10 22:27:37,478 INFO L226 Difference]: Without dead ends: 56662 [2021-03-10 22:27:37,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:27:37,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56662 states. [2021-03-10 22:27:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56662 to 50614. [2021-03-10 22:27:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50614 states, 50613 states have (on average 2.1933692924742654) internal successors, (111013), 50613 states have internal predecessors, (111013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50614 states to 50614 states and 111013 transitions. [2021-03-10 22:27:38,731 INFO L78 Accepts]: Start accepts. Automaton has 50614 states and 111013 transitions. Word has length 56 [2021-03-10 22:27:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:38,732 INFO L480 AbstractCegarLoop]: Abstraction has 50614 states and 111013 transitions. [2021-03-10 22:27:38,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 22:27:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 50614 states and 111013 transitions. [2021-03-10 22:27:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:38,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:38,777 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:38,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 22:27:38,978 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:38,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:38,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1939803739, now seen corresponding path program 68 times [2021-03-10 22:27:38,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:38,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989749620] [2021-03-10 22:27:38,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:39,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989749620] [2021-03-10 22:27:39,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710751142] [2021-03-10 22:27:39,039 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 22:27:39,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:27:39,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:39,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:39,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:39,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:27:39,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035821418] [2021-03-10 22:27:39,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:27:39,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:27:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:27:39,145 INFO L87 Difference]: Start difference. First operand 50614 states and 111013 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 22:27:39,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:39,527 INFO L93 Difference]: Finished difference Result 54674 states and 118916 transitions. [2021-03-10 22:27:39,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:27:39,528 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 56 [2021-03-10 22:27:39,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:39,633 INFO L225 Difference]: With dead ends: 54674 [2021-03-10 22:27:39,633 INFO L226 Difference]: Without dead ends: 54674 [2021-03-10 22:27:39,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:27:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54674 states. [2021-03-10 22:27:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54674 to 50774. [2021-03-10 22:27:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50774 states, 50773 states have (on average 2.192759931459634) internal successors, (111333), 50773 states have internal predecessors, (111333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50774 states to 50774 states and 111333 transitions. [2021-03-10 22:27:40,808 INFO L78 Accepts]: Start accepts. Automaton has 50774 states and 111333 transitions. Word has length 56 [2021-03-10 22:27:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:40,808 INFO L480 AbstractCegarLoop]: Abstraction has 50774 states and 111333 transitions. [2021-03-10 22:27:40,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 22:27:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 50774 states and 111333 transitions. [2021-03-10 22:27:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-03-10 22:27:40,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:40,854 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:41,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:41,060 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1664826169, now seen corresponding path program 69 times [2021-03-10 22:27:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:41,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529639709] [2021-03-10 22:27:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:41,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529639709] [2021-03-10 22:27:41,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914090721] [2021-03-10 22:27:41,119 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 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 22:27:41,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 22:27:41,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:41,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:27:41,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:41,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:41,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:27:41,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542231320] [2021-03-10 22:27:41,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:27:41,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:41,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:27:41,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:27:41,220 INFO L87 Difference]: Start difference. First operand 50774 states and 111333 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 22:27:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:41,936 INFO L93 Difference]: Finished difference Result 52880 states and 115293 transitions. [2021-03-10 22:27:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:27:41,937 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 56 [2021-03-10 22:27:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:42,036 INFO L225 Difference]: With dead ends: 52880 [2021-03-10 22:27:42,036 INFO L226 Difference]: Without dead ends: 52880 [2021-03-10 22:27:42,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:27:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52880 states. [2021-03-10 22:27:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52880 to 49354. [2021-03-10 22:27:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49354 states, 49353 states have (on average 2.193686300731465) internal successors, (108265), 49353 states have internal predecessors, (108265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49354 states to 49354 states and 108265 transitions. [2021-03-10 22:27:42,870 INFO L78 Accepts]: Start accepts. Automaton has 49354 states and 108265 transitions. Word has length 56 [2021-03-10 22:27:42,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:42,870 INFO L480 AbstractCegarLoop]: Abstraction has 49354 states and 108265 transitions. [2021-03-10 22:27:42,870 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 22:27:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 49354 states and 108265 transitions. [2021-03-10 22:27:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:27:42,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:42,931 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:43,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:43,132 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:43,132 INFO L82 PathProgramCache]: Analyzing trace with hash -418208773, now seen corresponding path program 70 times [2021-03-10 22:27:43,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:43,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939934424] [2021-03-10 22:27:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:43,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939934424] [2021-03-10 22:27:43,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020040951] [2021-03-10 22:27:43,241 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 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 22:27:43,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:27:43,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:43,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:27:43,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:43,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:43,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 22:27:43,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42936460] [2021-03-10 22:27:43,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:27:43,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:27:43,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:27:43,363 INFO L87 Difference]: Start difference. First operand 49354 states and 108265 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 22:27:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:43,992 INFO L93 Difference]: Finished difference Result 55302 states and 120443 transitions. [2021-03-10 22:27:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:27:43,992 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 66 [2021-03-10 22:27:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:44,102 INFO L225 Difference]: With dead ends: 55302 [2021-03-10 22:27:44,103 INFO L226 Difference]: Without dead ends: 55302 [2021-03-10 22:27:44,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:27:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55302 states. [2021-03-10 22:27:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55302 to 49998. [2021-03-10 22:27:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49998 states, 49997 states have (on average 2.195831749904994) internal successors, (109785), 49997 states have internal predecessors, (109785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49998 states to 49998 states and 109785 transitions. [2021-03-10 22:27:44,960 INFO L78 Accepts]: Start accepts. Automaton has 49998 states and 109785 transitions. Word has length 66 [2021-03-10 22:27:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:44,960 INFO L480 AbstractCegarLoop]: Abstraction has 49998 states and 109785 transitions. [2021-03-10 22:27:44,960 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 22:27:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 49998 states and 109785 transitions. [2021-03-10 22:27:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:27:45,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:45,310 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:45,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:45,523 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:45,524 INFO L82 PathProgramCache]: Analyzing trace with hash -12185795, now seen corresponding path program 71 times [2021-03-10 22:27:45,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:45,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949389251] [2021-03-10 22:27:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:45,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949389251] [2021-03-10 22:27:45,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586082982] [2021-03-10 22:27:45,565 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 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 22:27:45,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:27:45,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:45,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:27:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:45,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:45,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:45,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178230516] [2021-03-10 22:27:45,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:45,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:45,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:45,717 INFO L87 Difference]: Start difference. First operand 49998 states and 109785 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:27:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:46,025 INFO L93 Difference]: Finished difference Result 51084 states and 111615 transitions. [2021-03-10 22:27:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:27:46,026 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-03-10 22:27:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:46,137 INFO L225 Difference]: With dead ends: 51084 [2021-03-10 22:27:46,137 INFO L226 Difference]: Without dead ends: 51076 [2021-03-10 22:27:46,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:27:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51076 states. [2021-03-10 22:27:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51076 to 49894. [2021-03-10 22:27:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49894 states, 49893 states have (on average 2.193995149620187) internal successors, (109465), 49893 states have internal predecessors, (109465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49894 states to 49894 states and 109465 transitions. [2021-03-10 22:27:47,047 INFO L78 Accepts]: Start accepts. Automaton has 49894 states and 109465 transitions. Word has length 66 [2021-03-10 22:27:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:47,048 INFO L480 AbstractCegarLoop]: Abstraction has 49894 states and 109465 transitions. [2021-03-10 22:27:47,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:27:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 49894 states and 109465 transitions. [2021-03-10 22:27:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:27:47,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:47,321 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:47,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:47,522 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:47,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1308699737, now seen corresponding path program 72 times [2021-03-10 22:27:47,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:47,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892509622] [2021-03-10 22:27:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:47,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892509622] [2021-03-10 22:27:47,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659407609] [2021-03-10 22:27:47,558 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:27:47,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:27:47,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:47,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:27:47,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:47,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:47,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:47,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426923484] [2021-03-10 22:27:47,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:47,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:47,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:47,689 INFO L87 Difference]: Start difference. First operand 49894 states and 109465 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:27:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:47,985 INFO L93 Difference]: Finished difference Result 58739 states and 127815 transitions. [2021-03-10 22:27:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:27:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-03-10 22:27:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:48,107 INFO L225 Difference]: With dead ends: 58739 [2021-03-10 22:27:48,108 INFO L226 Difference]: Without dead ends: 58739 [2021-03-10 22:27:48,108 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:27:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58739 states. [2021-03-10 22:27:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58739 to 53954. [2021-03-10 22:27:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53954 states, 53953 states have (on average 2.204678145793561) internal successors, (118949), 53953 states have internal predecessors, (118949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53954 states to 53954 states and 118949 transitions. [2021-03-10 22:27:49,299 INFO L78 Accepts]: Start accepts. Automaton has 53954 states and 118949 transitions. Word has length 66 [2021-03-10 22:27:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:49,300 INFO L480 AbstractCegarLoop]: Abstraction has 53954 states and 118949 transitions. [2021-03-10 22:27:49,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:27:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 53954 states and 118949 transitions. [2021-03-10 22:27:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:27:49,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:49,362 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:49,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:49,563 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:49,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:49,564 INFO L82 PathProgramCache]: Analyzing trace with hash -138643737, now seen corresponding path program 73 times [2021-03-10 22:27:49,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:49,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423145086] [2021-03-10 22:27:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:49,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423145086] [2021-03-10 22:27:49,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936572745] [2021-03-10 22:27:49,615 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:49,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:27:49,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:49,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:49,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:49,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150918158] [2021-03-10 22:27:49,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:49,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:49,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:49,726 INFO L87 Difference]: Start difference. First operand 53954 states and 118949 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:27:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:50,078 INFO L93 Difference]: Finished difference Result 56467 states and 123155 transitions. [2021-03-10 22:27:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:27:50,078 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-03-10 22:27:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:50,191 INFO L225 Difference]: With dead ends: 56467 [2021-03-10 22:27:50,191 INFO L226 Difference]: Without dead ends: 56375 [2021-03-10 22:27:50,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:27:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56375 states. [2021-03-10 22:27:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56375 to 51614. [2021-03-10 22:27:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.1976827543448354) internal successors, (113429), 51613 states have internal predecessors, (113429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113429 transitions. [2021-03-10 22:27:51,284 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113429 transitions. Word has length 66 [2021-03-10 22:27:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:51,284 INFO L480 AbstractCegarLoop]: Abstraction has 51614 states and 113429 transitions. [2021-03-10 22:27:51,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:27:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113429 transitions. [2021-03-10 22:27:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:27:51,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:51,346 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:51,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:51,547 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:51,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1619583693, now seen corresponding path program 74 times [2021-03-10 22:27:51,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:51,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337373341] [2021-03-10 22:27:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:51,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337373341] [2021-03-10 22:27:51,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64486628] [2021-03-10 22:27:51,590 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 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 22:27:51,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:27:51,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:51,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:27:51,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:27:51,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:51,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:27:51,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351573097] [2021-03-10 22:27:51,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:27:51,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:51,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:27:51,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:27:51,713 INFO L87 Difference]: Start difference. First operand 51614 states and 113429 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 22:27:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:52,085 INFO L93 Difference]: Finished difference Result 53573 states and 116784 transitions. [2021-03-10 22:27:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:27:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 66 [2021-03-10 22:27:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:52,196 INFO L225 Difference]: With dead ends: 53573 [2021-03-10 22:27:52,196 INFO L226 Difference]: Without dead ends: 53525 [2021-03-10 22:27:52,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:27:52,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53525 states. [2021-03-10 22:27:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53525 to 51614. [2021-03-10 22:27:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.196520256524519) internal successors, (113369), 51613 states have internal predecessors, (113369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113369 transitions. [2021-03-10 22:27:53,481 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113369 transitions. Word has length 66 [2021-03-10 22:27:53,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:53,481 INFO L480 AbstractCegarLoop]: Abstraction has 51614 states and 113369 transitions. [2021-03-10 22:27:53,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 22:27:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113369 transitions. [2021-03-10 22:27:53,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:27:53,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:53,545 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:53,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:53,745 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash -607697029, now seen corresponding path program 75 times [2021-03-10 22:27:53,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:53,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450777765] [2021-03-10 22:27:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:27:53,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450777765] [2021-03-10 22:27:53,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501849995] [2021-03-10 22:27:53,785 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 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 22:27:53,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:27:53,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:27:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:27:53,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:53,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:53,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998840512] [2021-03-10 22:27:53,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:53,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:53,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:53,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:53,898 INFO L87 Difference]: Start difference. First operand 51614 states and 113369 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 22:27:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:54,234 INFO L93 Difference]: Finished difference Result 66038 states and 143412 transitions. [2021-03-10 22:27:54,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:27:54,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 66 [2021-03-10 22:27:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:54,368 INFO L225 Difference]: With dead ends: 66038 [2021-03-10 22:27:54,369 INFO L226 Difference]: Without dead ends: 66011 [2021-03-10 22:27:54,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:27:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66011 states. [2021-03-10 22:27:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66011 to 55054. [2021-03-10 22:27:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55054 states, 55053 states have (on average 2.1976822334840973) internal successors, (120989), 55053 states have internal predecessors, (120989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55054 states to 55054 states and 120989 transitions. [2021-03-10 22:27:55,622 INFO L78 Accepts]: Start accepts. Automaton has 55054 states and 120989 transitions. Word has length 66 [2021-03-10 22:27:55,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:55,622 INFO L480 AbstractCegarLoop]: Abstraction has 55054 states and 120989 transitions. [2021-03-10 22:27:55,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 22:27:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 55054 states and 120989 transitions. [2021-03-10 22:27:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:27:55,682 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:55,682 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:55,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-10 22:27:55,883 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash -321373819, now seen corresponding path program 76 times [2021-03-10 22:27:55,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:55,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27404456] [2021-03-10 22:27:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:55,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27404456] [2021-03-10 22:27:55,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454880656] [2021-03-10 22:27:55,919 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 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 22:27:55,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:27:55,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:55,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:27:55,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:56,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:56,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:56,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886663233] [2021-03-10 22:27:56,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:56,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:56,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:56,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:56,035 INFO L87 Difference]: Start difference. First operand 55054 states and 120989 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:27:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:56,340 INFO L93 Difference]: Finished difference Result 64613 states and 140751 transitions. [2021-03-10 22:27:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:27:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-03-10 22:27:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:56,468 INFO L225 Difference]: With dead ends: 64613 [2021-03-10 22:27:56,468 INFO L226 Difference]: Without dead ends: 64613 [2021-03-10 22:27:56,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:27:56,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64613 states. [2021-03-10 22:27:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64613 to 59214. [2021-03-10 22:27:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59214 states, 59213 states have (on average 2.2070322395419923) internal successors, (130685), 59213 states have internal predecessors, (130685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:27:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59214 states to 59214 states and 130685 transitions. [2021-03-10 22:27:57,873 INFO L78 Accepts]: Start accepts. Automaton has 59214 states and 130685 transitions. Word has length 66 [2021-03-10 22:27:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:27:57,873 INFO L480 AbstractCegarLoop]: Abstraction has 59214 states and 130685 transitions. [2021-03-10 22:27:57,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:27:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 59214 states and 130685 transitions. [2021-03-10 22:27:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:27:57,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:27:57,935 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:27:58,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:27:58,136 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:27:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:27:58,136 INFO L82 PathProgramCache]: Analyzing trace with hash 848682181, now seen corresponding path program 77 times [2021-03-10 22:27:58,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:27:58,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950531232] [2021-03-10 22:27:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:27:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:27:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:58,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950531232] [2021-03-10 22:27:58,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462534938] [2021-03-10 22:27:58,171 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 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 22:27:58,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:27:58,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:27:58,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:27:58,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:27:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:27:58,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:27:58,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:27:58,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303545326] [2021-03-10 22:27:58,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:27:58,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:27:58,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:27:58,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:27:58,278 INFO L87 Difference]: Start difference. First operand 59214 states and 130685 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:27:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:27:58,911 INFO L93 Difference]: Finished difference Result 61966 states and 135259 transitions. [2021-03-10 22:27:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:27:58,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-03-10 22:27:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:27:59,037 INFO L225 Difference]: With dead ends: 61966 [2021-03-10 22:27:59,037 INFO L226 Difference]: Without dead ends: 61870 [2021-03-10 22:27:59,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:27:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61870 states. [2021-03-10 22:28:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61870 to 56914. [2021-03-10 22:28:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56914 states, 56913 states have (on average 2.2002178764078506) internal successors, (125221), 56913 states have internal predecessors, (125221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56914 states to 56914 states and 125221 transitions. [2021-03-10 22:28:00,453 INFO L78 Accepts]: Start accepts. Automaton has 56914 states and 125221 transitions. Word has length 66 [2021-03-10 22:28:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:00,454 INFO L480 AbstractCegarLoop]: Abstraction has 56914 states and 125221 transitions. [2021-03-10 22:28:00,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:28:00,454 INFO L276 IsEmpty]: Start isEmpty. Operand 56914 states and 125221 transitions. [2021-03-10 22:28:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:00,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:00,526 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:00,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 22:28:00,728 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:00,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1688057685, now seen corresponding path program 78 times [2021-03-10 22:28:00,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:00,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518421746] [2021-03-10 22:28:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:00,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518421746] [2021-03-10 22:28:00,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65408799] [2021-03-10 22:28:00,778 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 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 22:28:00,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 22:28:00,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:00,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:00,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:00,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:00,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:28:00,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541684954] [2021-03-10 22:28:00,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:28:00,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:00,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:28:00,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:28:00,914 INFO L87 Difference]: Start difference. First operand 56914 states and 125221 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 22:28:01,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:01,319 INFO L93 Difference]: Finished difference Result 59554 states and 129655 transitions. [2021-03-10 22:28:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:28:01,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 66 [2021-03-10 22:28:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:01,448 INFO L225 Difference]: With dead ends: 59554 [2021-03-10 22:28:01,448 INFO L226 Difference]: Without dead ends: 59458 [2021-03-10 22:28:01,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:28:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59458 states. [2021-03-10 22:28:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59458 to 56894. [2021-03-10 22:28:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56894 states, 56893 states have (on average 2.1983548063909444) internal successors, (125071), 56893 states have internal predecessors, (125071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56894 states to 56894 states and 125071 transitions. [2021-03-10 22:28:02,751 INFO L78 Accepts]: Start accepts. Automaton has 56894 states and 125071 transitions. Word has length 66 [2021-03-10 22:28:02,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:02,751 INFO L480 AbstractCegarLoop]: Abstraction has 56894 states and 125071 transitions. [2021-03-10 22:28:02,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 22:28:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 56894 states and 125071 transitions. [2021-03-10 22:28:02,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:02,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:02,815 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:03,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:03,016 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash -326026235, now seen corresponding path program 79 times [2021-03-10 22:28:03,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:03,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608738253] [2021-03-10 22:28:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:03,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608738253] [2021-03-10 22:28:03,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409591940] [2021-03-10 22:28:03,064 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:03,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:03,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:03,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:03,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:28:03,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45786626] [2021-03-10 22:28:03,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:28:03,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:03,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:28:03,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:28:03,173 INFO L87 Difference]: Start difference. First operand 56894 states and 125071 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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 22:28:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:03,537 INFO L93 Difference]: Finished difference Result 59114 states and 128843 transitions. [2021-03-10 22:28:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:28:03,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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 66 [2021-03-10 22:28:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:03,658 INFO L225 Difference]: With dead ends: 59114 [2021-03-10 22:28:03,659 INFO L226 Difference]: Without dead ends: 58982 [2021-03-10 22:28:03,659 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:28:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58982 states. [2021-03-10 22:28:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58982 to 56922. [2021-03-10 22:28:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56922 states, 56921 states have (on average 2.1963950036014825) internal successors, (125021), 56921 states have internal predecessors, (125021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56922 states to 56922 states and 125021 transitions. [2021-03-10 22:28:04,985 INFO L78 Accepts]: Start accepts. Automaton has 56922 states and 125021 transitions. Word has length 66 [2021-03-10 22:28:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:04,985 INFO L480 AbstractCegarLoop]: Abstraction has 56922 states and 125021 transitions. [2021-03-10 22:28:04,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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 22:28:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 56922 states and 125021 transitions. [2021-03-10 22:28:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:05,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:05,047 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:05,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:05,248 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:05,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1465776773, now seen corresponding path program 80 times [2021-03-10 22:28:05,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:05,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076528309] [2021-03-10 22:28:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:28:05,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076528309] [2021-03-10 22:28:05,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670458092] [2021-03-10 22:28:05,288 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 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 22:28:05,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:28:05,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:05,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:05,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:28:05,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:05,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:28:05,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720204881] [2021-03-10 22:28:05,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:28:05,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:28:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:28:05,414 INFO L87 Difference]: Start difference. First operand 56922 states and 125021 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 22:28:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:05,757 INFO L93 Difference]: Finished difference Result 69297 states and 150869 transitions. [2021-03-10 22:28:05,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:28:05,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 66 [2021-03-10 22:28:05,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:05,897 INFO L225 Difference]: With dead ends: 69297 [2021-03-10 22:28:05,897 INFO L226 Difference]: Without dead ends: 69270 [2021-03-10 22:28:05,897 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:28:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-03-10 22:28:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 56622. [2021-03-10 22:28:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56622 states, 56621 states have (on average 2.1971529997704033) internal successors, (124405), 56621 states have internal predecessors, (124405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56622 states to 56622 states and 124405 transitions. [2021-03-10 22:28:07,280 INFO L78 Accepts]: Start accepts. Automaton has 56622 states and 124405 transitions. Word has length 66 [2021-03-10 22:28:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:07,280 INFO L480 AbstractCegarLoop]: Abstraction has 56622 states and 124405 transitions. [2021-03-10 22:28:07,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 22:28:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 56622 states and 124405 transitions. [2021-03-10 22:28:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:07,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:07,343 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:07,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:07,544 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:07,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:07,544 INFO L82 PathProgramCache]: Analyzing trace with hash -904475993, now seen corresponding path program 81 times [2021-03-10 22:28:07,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:07,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549857994] [2021-03-10 22:28:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:07,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549857994] [2021-03-10 22:28:07,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343659997] [2021-03-10 22:28:07,581 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 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 22:28:07,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 22:28:07,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:07,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:07,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:07,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:07,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:28:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168906303] [2021-03-10 22:28:07,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:28:07,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:28:07,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:28:07,711 INFO L87 Difference]: Start difference. First operand 56622 states and 124405 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:28:08,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:08,061 INFO L93 Difference]: Finished difference Result 67026 states and 146165 transitions. [2021-03-10 22:28:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:28:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-03-10 22:28:08,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:08,564 INFO L225 Difference]: With dead ends: 67026 [2021-03-10 22:28:08,565 INFO L226 Difference]: Without dead ends: 67023 [2021-03-10 22:28:08,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:28:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67023 states. [2021-03-10 22:28:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67023 to 62354. [2021-03-10 22:28:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62354 states, 62353 states have (on average 2.206229050727311) internal successors, (137565), 62353 states have internal predecessors, (137565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62354 states to 62354 states and 137565 transitions. [2021-03-10 22:28:09,759 INFO L78 Accepts]: Start accepts. Automaton has 62354 states and 137565 transitions. Word has length 66 [2021-03-10 22:28:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:09,759 INFO L480 AbstractCegarLoop]: Abstraction has 62354 states and 137565 transitions. [2021-03-10 22:28:09,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:28:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 62354 states and 137565 transitions. [2021-03-10 22:28:10,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:10,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:10,115 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:10,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:10,316 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash 265580007, now seen corresponding path program 82 times [2021-03-10 22:28:10,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:10,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501633013] [2021-03-10 22:28:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:10,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501633013] [2021-03-10 22:28:10,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213862278] [2021-03-10 22:28:10,352 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 22:28:10,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:28:10,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:10,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:10,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:10,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:10,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:28:10,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116078604] [2021-03-10 22:28:10,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:28:10,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:10,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:28:10,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:28:10,466 INFO L87 Difference]: Start difference. First operand 62354 states and 137565 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:28:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:10,832 INFO L93 Difference]: Finished difference Result 65089 states and 142128 transitions. [2021-03-10 22:28:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:28:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-03-10 22:28:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:10,966 INFO L225 Difference]: With dead ends: 65089 [2021-03-10 22:28:10,966 INFO L226 Difference]: Without dead ends: 65029 [2021-03-10 22:28:10,966 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:28:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65029 states. [2021-03-10 22:28:12,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65029 to 59590. [2021-03-10 22:28:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.20163117353874) internal successors, (131193), 59589 states have internal predecessors, (131193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131193 transitions. [2021-03-10 22:28:12,356 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131193 transitions. Word has length 66 [2021-03-10 22:28:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:12,356 INFO L480 AbstractCegarLoop]: Abstraction has 59590 states and 131193 transitions. [2021-03-10 22:28:12,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:28:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131193 transitions. [2021-03-10 22:28:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:12,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:12,422 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:12,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:12,624 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:12,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2023807437, now seen corresponding path program 83 times [2021-03-10 22:28:12,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:12,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219888735] [2021-03-10 22:28:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:12,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219888735] [2021-03-10 22:28:12,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755773706] [2021-03-10 22:28:12,666 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 22:28:12,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 22:28:12,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:12,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:12,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:12,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:12,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:28:12,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307804193] [2021-03-10 22:28:12,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:28:12,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:12,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:28:12,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:28:12,777 INFO L87 Difference]: Start difference. First operand 59590 states and 131193 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 22:28:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:13,132 INFO L93 Difference]: Finished difference Result 62315 states and 135765 transitions. [2021-03-10 22:28:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:28:13,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 66 [2021-03-10 22:28:13,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:13,259 INFO L225 Difference]: With dead ends: 62315 [2021-03-10 22:28:13,260 INFO L226 Difference]: Without dead ends: 62243 [2021-03-10 22:28:13,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:28:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62243 states. [2021-03-10 22:28:14,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62243 to 59590. [2021-03-10 22:28:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1996173790464684) internal successors, (131073), 59589 states have internal predecessors, (131073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131073 transitions. [2021-03-10 22:28:14,582 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131073 transitions. Word has length 66 [2021-03-10 22:28:14,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:14,582 INFO L480 AbstractCegarLoop]: Abstraction has 59590 states and 131073 transitions. [2021-03-10 22:28:14,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 22:28:14,582 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131073 transitions. [2021-03-10 22:28:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:14,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:14,644 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:14,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:14,844 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:14,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:14,845 INFO L82 PathProgramCache]: Analyzing trace with hash -909128409, now seen corresponding path program 84 times [2021-03-10 22:28:14,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:14,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511251733] [2021-03-10 22:28:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:14,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511251733] [2021-03-10 22:28:14,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295697720] [2021-03-10 22:28:14,891 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:14,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 22:28:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:14,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:14,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:15,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:15,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:28:15,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583604726] [2021-03-10 22:28:15,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:28:15,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:15,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:28:15,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:28:15,020 INFO L87 Difference]: Start difference. First operand 59590 states and 131073 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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 22:28:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:15,390 INFO L93 Difference]: Finished difference Result 62467 states and 135889 transitions. [2021-03-10 22:28:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:28:15,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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 66 [2021-03-10 22:28:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:15,517 INFO L225 Difference]: With dead ends: 62467 [2021-03-10 22:28:15,517 INFO L226 Difference]: Without dead ends: 62335 [2021-03-10 22:28:15,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:28:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62335 states. [2021-03-10 22:28:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62335 to 59590. [2021-03-10 22:28:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1969323197234387) internal successors, (130913), 59589 states have internal predecessors, (130913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 130913 transitions. [2021-03-10 22:28:17,009 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 130913 transitions. Word has length 66 [2021-03-10 22:28:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:17,009 INFO L480 AbstractCegarLoop]: Abstraction has 59590 states and 130913 transitions. [2021-03-10 22:28:17,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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 22:28:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 130913 transitions. [2021-03-10 22:28:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:17,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:17,068 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:17,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-03-10 22:28:17,287 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:17,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1791126029, now seen corresponding path program 85 times [2021-03-10 22:28:17,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:17,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387486239] [2021-03-10 22:28:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:17,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387486239] [2021-03-10 22:28:17,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671802681] [2021-03-10 22:28:17,395 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 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 22:28:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:17,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:17,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:17,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:17,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:28:17,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126717152] [2021-03-10 22:28:17,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:28:17,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:17,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:28:17,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:28:17,503 INFO L87 Difference]: Start difference. First operand 59590 states and 130913 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 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 22:28:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:18,239 INFO L93 Difference]: Finished difference Result 62011 states and 135009 transitions. [2021-03-10 22:28:18,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:28:18,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 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 66 [2021-03-10 22:28:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:18,359 INFO L225 Difference]: With dead ends: 62011 [2021-03-10 22:28:18,360 INFO L226 Difference]: Without dead ends: 61819 [2021-03-10 22:28:18,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:28:18,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61819 states. [2021-03-10 22:28:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61819 to 59670. [2021-03-10 22:28:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59670 states, 59669 states have (on average 2.193383498969314) internal successors, (130877), 59669 states have internal predecessors, (130877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59670 states to 59670 states and 130877 transitions. [2021-03-10 22:28:19,434 INFO L78 Accepts]: Start accepts. Automaton has 59670 states and 130877 transitions. Word has length 66 [2021-03-10 22:28:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:19,434 INFO L480 AbstractCegarLoop]: Abstraction has 59670 states and 130877 transitions. [2021-03-10 22:28:19,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 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 22:28:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 59670 states and 130877 transitions. [2021-03-10 22:28:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:19,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:19,498 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:19,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:19,699 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1714547269, now seen corresponding path program 86 times [2021-03-10 22:28:19,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:19,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140917490] [2021-03-10 22:28:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:28:19,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140917490] [2021-03-10 22:28:19,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643001984] [2021-03-10 22:28:19,768 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 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 22:28:20,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:28:20,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:20,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:20,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:28:20,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:20,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:28:20,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639981486] [2021-03-10 22:28:20,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:28:20,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:20,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:28:20,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:28:20,195 INFO L87 Difference]: Start difference. First operand 59670 states and 130877 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 22:28:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:20,561 INFO L93 Difference]: Finished difference Result 65831 states and 143283 transitions. [2021-03-10 22:28:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:28:20,561 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 66 [2021-03-10 22:28:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:20,694 INFO L225 Difference]: With dead ends: 65831 [2021-03-10 22:28:20,694 INFO L226 Difference]: Without dead ends: 65774 [2021-03-10 22:28:20,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:28:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65774 states. [2021-03-10 22:28:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65774 to 55516. [2021-03-10 22:28:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55516 states, 55515 states have (on average 2.1908132937044043) internal successors, (121623), 55515 states have internal predecessors, (121623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55516 states to 55516 states and 121623 transitions. [2021-03-10 22:28:22,098 INFO L78 Accepts]: Start accepts. Automaton has 55516 states and 121623 transitions. Word has length 66 [2021-03-10 22:28:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:22,098 INFO L480 AbstractCegarLoop]: Abstraction has 55516 states and 121623 transitions. [2021-03-10 22:28:22,098 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 22:28:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 55516 states and 121623 transitions. [2021-03-10 22:28:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:22,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:22,162 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:22,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 22:28:22,362 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:22,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:22,363 INFO L82 PathProgramCache]: Analyzing trace with hash 129559749, now seen corresponding path program 87 times [2021-03-10 22:28:22,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:22,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380325289] [2021-03-10 22:28:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 22:28:22,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380325289] [2021-03-10 22:28:22,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908107776] [2021-03-10 22:28:22,422 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 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 22:28:22,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 22:28:22,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:22,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:22,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 22:28:22,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:22,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:28:22,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483304123] [2021-03-10 22:28:22,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:28:22,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:22,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:28:22,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:28:22,542 INFO L87 Difference]: Start difference. First operand 55516 states and 121623 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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 22:28:22,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:22,874 INFO L93 Difference]: Finished difference Result 61581 states and 133847 transitions. [2021-03-10 22:28:22,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:28:22,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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 66 [2021-03-10 22:28:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:23,001 INFO L225 Difference]: With dead ends: 61581 [2021-03-10 22:28:23,001 INFO L226 Difference]: Without dead ends: 61554 [2021-03-10 22:28:23,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:28:23,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61554 states. [2021-03-10 22:28:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61554 to 54860. [2021-03-10 22:28:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54860 states, 54859 states have (on average 2.1912721704733955) internal successors, (120211), 54859 states have internal predecessors, (120211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54860 states to 54860 states and 120211 transitions. [2021-03-10 22:28:24,372 INFO L78 Accepts]: Start accepts. Automaton has 54860 states and 120211 transitions. Word has length 66 [2021-03-10 22:28:24,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:24,372 INFO L480 AbstractCegarLoop]: Abstraction has 54860 states and 120211 transitions. [2021-03-10 22:28:24,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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 22:28:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 54860 states and 120211 transitions. [2021-03-10 22:28:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:24,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:24,440 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:24,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:24,641 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash -518473861, now seen corresponding path program 88 times [2021-03-10 22:28:24,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:24,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112643255] [2021-03-10 22:28:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:28:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112643255] [2021-03-10 22:28:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776258013] [2021-03-10 22:28:24,679 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 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 22:28:24,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:28:24,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:24,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:24,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:28:24,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:24,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:28:24,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674223591] [2021-03-10 22:28:24,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:28:24,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:24,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:28:24,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:28:24,818 INFO L87 Difference]: Start difference. First operand 54860 states and 120211 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 22:28:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:25,135 INFO L93 Difference]: Finished difference Result 62633 states and 136579 transitions. [2021-03-10 22:28:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:28:25,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 66 [2021-03-10 22:28:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:25,266 INFO L225 Difference]: With dead ends: 62633 [2021-03-10 22:28:25,266 INFO L226 Difference]: Without dead ends: 62630 [2021-03-10 22:28:25,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:28:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62630 states. [2021-03-10 22:28:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62630 to 56940. [2021-03-10 22:28:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56940 states, 56939 states have (on average 2.195525035564376) internal successors, (125011), 56939 states have internal predecessors, (125011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56940 states to 56940 states and 125011 transitions. [2021-03-10 22:28:26,503 INFO L78 Accepts]: Start accepts. Automaton has 56940 states and 125011 transitions. Word has length 66 [2021-03-10 22:28:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:26,503 INFO L480 AbstractCegarLoop]: Abstraction has 56940 states and 125011 transitions. [2021-03-10 22:28:26,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 22:28:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 56940 states and 125011 transitions. [2021-03-10 22:28:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:26,563 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:26,563 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:26,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 22:28:26,764 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:26,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1653142277, now seen corresponding path program 89 times [2021-03-10 22:28:26,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:26,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367625980] [2021-03-10 22:28:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:26,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367625980] [2021-03-10 22:28:26,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695783345] [2021-03-10 22:28:26,807 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 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 22:28:26,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 22:28:26,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:26,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:28:26,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:26,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:26,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 22:28:26,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002299542] [2021-03-10 22:28:26,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:28:26,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:26,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:28:26,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:28:26,956 INFO L87 Difference]: Start difference. First operand 56940 states and 125011 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:28:27,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:27,301 INFO L93 Difference]: Finished difference Result 66890 states and 145747 transitions. [2021-03-10 22:28:27,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:28:27,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-03-10 22:28:27,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:27,436 INFO L225 Difference]: With dead ends: 66890 [2021-03-10 22:28:27,436 INFO L226 Difference]: Without dead ends: 66890 [2021-03-10 22:28:27,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:28:27,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66890 states. [2021-03-10 22:28:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66890 to 62652. [2021-03-10 22:28:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62652 states, 62651 states have (on average 2.2049288917974175) internal successors, (138141), 62651 states have internal predecessors, (138141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62652 states to 62652 states and 138141 transitions. [2021-03-10 22:28:28,843 INFO L78 Accepts]: Start accepts. Automaton has 62652 states and 138141 transitions. Word has length 66 [2021-03-10 22:28:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:28,843 INFO L480 AbstractCegarLoop]: Abstraction has 62652 states and 138141 transitions. [2021-03-10 22:28:28,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 22:28:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 62652 states and 138141 transitions. [2021-03-10 22:28:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:28,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:28,909 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:29,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 22:28:29,123 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:29,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1471769019, now seen corresponding path program 90 times [2021-03-10 22:28:29,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:29,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493930800] [2021-03-10 22:28:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:29,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493930800] [2021-03-10 22:28:29,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120880841] [2021-03-10 22:28:29,161 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:29,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 22:28:29,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:29,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:28:29,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 27 proven. 74 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-03-10 22:28:29,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:29,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 22:28:29,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196423899] [2021-03-10 22:28:29,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:28:29,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:28:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:28:29,320 INFO L87 Difference]: Start difference. First operand 62652 states and 138141 transitions. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 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 22:28:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:30,919 INFO L93 Difference]: Finished difference Result 90468 states and 195554 transitions. [2021-03-10 22:28:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 22:28:30,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 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 66 [2021-03-10 22:28:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:31,113 INFO L225 Difference]: With dead ends: 90468 [2021-03-10 22:28:31,113 INFO L226 Difference]: Without dead ends: 90440 [2021-03-10 22:28:31,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 587.5ms TimeCoverageRelationStatistics Valid=788, Invalid=4182, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 22:28:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90440 states. [2021-03-10 22:28:32,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90440 to 64804. [2021-03-10 22:28:32,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2016727620634846) internal successors, (142675), 64803 states have internal predecessors, (142675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:32,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142675 transitions. [2021-03-10 22:28:32,745 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142675 transitions. Word has length 66 [2021-03-10 22:28:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:32,745 INFO L480 AbstractCegarLoop]: Abstraction has 64804 states and 142675 transitions. [2021-03-10 22:28:32,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 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 22:28:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142675 transitions. [2021-03-10 22:28:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:32,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:32,810 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:33,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 22:28:33,011 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:33,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:33,011 INFO L82 PathProgramCache]: Analyzing trace with hash 47459948, now seen corresponding path program 91 times [2021-03-10 22:28:33,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:33,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939047328] [2021-03-10 22:28:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:33,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939047328] [2021-03-10 22:28:33,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881794172] [2021-03-10 22:28:33,060 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 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 22:28:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:33,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:28:33,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-03-10 22:28:33,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:33,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-03-10 22:28:33,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825551819] [2021-03-10 22:28:33,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:28:33,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:33,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:28:33,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:28:33,170 INFO L87 Difference]: Start difference. First operand 64804 states and 142675 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 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 22:28:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:33,537 INFO L93 Difference]: Finished difference Result 71842 states and 157251 transitions. [2021-03-10 22:28:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:28:33,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 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 66 [2021-03-10 22:28:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:33,688 INFO L225 Difference]: With dead ends: 71842 [2021-03-10 22:28:33,688 INFO L226 Difference]: Without dead ends: 71794 [2021-03-10 22:28:33,688 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:28:33,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71794 states. [2021-03-10 22:28:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71794 to 64804. [2021-03-10 22:28:35,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2010555066895052) internal successors, (142635), 64803 states have internal predecessors, (142635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142635 transitions. [2021-03-10 22:28:35,339 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142635 transitions. Word has length 66 [2021-03-10 22:28:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:35,339 INFO L480 AbstractCegarLoop]: Abstraction has 64804 states and 142635 transitions. [2021-03-10 22:28:35,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 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 22:28:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142635 transitions. [2021-03-10 22:28:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:35,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:35,404 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:35,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:35,605 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash -442650298, now seen corresponding path program 92 times [2021-03-10 22:28:35,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:35,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135587308] [2021-03-10 22:28:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 52 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:35,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135587308] [2021-03-10 22:28:35,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898688766] [2021-03-10 22:28:35,660 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 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 22:28:35,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:28:35,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:35,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:28:35,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-03-10 22:28:35,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:35,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-03-10 22:28:35,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444004314] [2021-03-10 22:28:35,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:28:35,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:35,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:28:35,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:28:35,773 INFO L87 Difference]: Start difference. First operand 64804 states and 142635 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 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 22:28:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:36,480 INFO L93 Difference]: Finished difference Result 72032 states and 157512 transitions. [2021-03-10 22:28:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:28:36,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 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 66 [2021-03-10 22:28:36,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:36,624 INFO L225 Difference]: With dead ends: 72032 [2021-03-10 22:28:36,624 INFO L226 Difference]: Without dead ends: 71944 [2021-03-10 22:28:36,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:28:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71944 states. [2021-03-10 22:28:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71944 to 66864. [2021-03-10 22:28:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66864 states, 66863 states have (on average 2.2050910069844307) internal successors, (147439), 66863 states have internal predecessors, (147439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66864 states to 66864 states and 147439 transitions. [2021-03-10 22:28:38,202 INFO L78 Accepts]: Start accepts. Automaton has 66864 states and 147439 transitions. Word has length 66 [2021-03-10 22:28:38,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:38,203 INFO L480 AbstractCegarLoop]: Abstraction has 66864 states and 147439 transitions. [2021-03-10 22:28:38,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 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 22:28:38,203 INFO L276 IsEmpty]: Start isEmpty. Operand 66864 states and 147439 transitions. [2021-03-10 22:28:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-03-10 22:28:38,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:38,263 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:38,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 22:28:38,467 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash 361914028, now seen corresponding path program 93 times [2021-03-10 22:28:38,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:38,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585024858] [2021-03-10 22:28:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 62 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:38,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585024858] [2021-03-10 22:28:38,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875214943] [2021-03-10 22:28:38,533 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 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 22:28:38,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:28:38,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:38,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 22:28:38,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-03-10 22:28:38,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:38,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-03-10 22:28:38,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919350262] [2021-03-10 22:28:38,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:28:38,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:38,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:28:38,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:28:38,718 INFO L87 Difference]: Start difference. First operand 66864 states and 147439 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:40,898 INFO L93 Difference]: Finished difference Result 139029 states and 299640 transitions. [2021-03-10 22:28:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-03-10 22:28:40,899 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-03-10 22:28:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:41,105 INFO L225 Difference]: With dead ends: 139029 [2021-03-10 22:28:41,105 INFO L226 Difference]: Without dead ends: 138261 [2021-03-10 22:28:41,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 935.0ms TimeCoverageRelationStatistics Valid=961, Invalid=9139, Unknown=0, NotChecked=0, Total=10100 [2021-03-10 22:28:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138261 states. [2021-03-10 22:28:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138261 to 102720. [2021-03-10 22:28:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102720 states, 102719 states have (on average 2.1767637924824035) internal successors, (223595), 102719 states have internal predecessors, (223595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102720 states to 102720 states and 223595 transitions. [2021-03-10 22:28:43,551 INFO L78 Accepts]: Start accepts. Automaton has 102720 states and 223595 transitions. Word has length 66 [2021-03-10 22:28:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:43,552 INFO L480 AbstractCegarLoop]: Abstraction has 102720 states and 223595 transitions. [2021-03-10 22:28:43,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 102720 states and 223595 transitions. [2021-03-10 22:28:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:28:43,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:43,643 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:43,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:43,860 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2025977669, now seen corresponding path program 94 times [2021-03-10 22:28:43,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:43,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404635962] [2021-03-10 22:28:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:43,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404635962] [2021-03-10 22:28:43,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4786405] [2021-03-10 22:28:43,948 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 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 22:28:43,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:28:43,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:43,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:28:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:44,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:44,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 22:28:44,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013201978] [2021-03-10 22:28:44,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:28:44,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:44,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:28:44,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:28:44,073 INFO L87 Difference]: Start difference. First operand 102720 states and 223595 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 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 22:28:44,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:44,689 INFO L93 Difference]: Finished difference Result 133769 states and 293050 transitions. [2021-03-10 22:28:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:28:44,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 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 76 [2021-03-10 22:28:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:44,919 INFO L225 Difference]: With dead ends: 133769 [2021-03-10 22:28:44,919 INFO L226 Difference]: Without dead ends: 133551 [2021-03-10 22:28:44,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:28:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133551 states. [2021-03-10 22:28:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133551 to 130358. [2021-03-10 22:28:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130358 states, 130357 states have (on average 2.1991991224099974) internal successors, (286681), 130357 states have internal predecessors, (286681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130358 states to 130358 states and 286681 transitions. [2021-03-10 22:28:47,611 INFO L78 Accepts]: Start accepts. Automaton has 130358 states and 286681 transitions. Word has length 76 [2021-03-10 22:28:47,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:47,611 INFO L480 AbstractCegarLoop]: Abstraction has 130358 states and 286681 transitions. [2021-03-10 22:28:47,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 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 22:28:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 130358 states and 286681 transitions. [2021-03-10 22:28:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:28:47,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:47,709 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:47,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 22:28:47,911 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:47,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1940313489, now seen corresponding path program 95 times [2021-03-10 22:28:47,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:47,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067962473] [2021-03-10 22:28:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:47,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067962473] [2021-03-10 22:28:47,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648231328] [2021-03-10 22:28:47,956 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 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 22:28:47,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:28:47,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:28:47,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:28:48,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:48,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:28:48,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634858958] [2021-03-10 22:28:48,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:28:48,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:48,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:28:48,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:28:48,082 INFO L87 Difference]: Start difference. First operand 130358 states and 286681 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:28:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:48,979 INFO L93 Difference]: Finished difference Result 133389 states and 291682 transitions. [2021-03-10 22:28:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:28:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-03-10 22:28:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:49,173 INFO L225 Difference]: With dead ends: 133389 [2021-03-10 22:28:49,173 INFO L226 Difference]: Without dead ends: 133389 [2021-03-10 22:28:49,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:28:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133389 states. [2021-03-10 22:28:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133389 to 125674. [2021-03-10 22:28:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125674 states, 125673 states have (on average 2.193892085014283) internal successors, (275713), 125673 states have internal predecessors, (275713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125674 states to 125674 states and 275713 transitions. [2021-03-10 22:28:51,727 INFO L78 Accepts]: Start accepts. Automaton has 125674 states and 275713 transitions. Word has length 76 [2021-03-10 22:28:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:51,727 INFO L480 AbstractCegarLoop]: Abstraction has 125674 states and 275713 transitions. [2021-03-10 22:28:51,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:28:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 125674 states and 275713 transitions. [2021-03-10 22:28:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:28:51,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:51,821 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:52,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:52,022 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1246228997, now seen corresponding path program 96 times [2021-03-10 22:28:52,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:52,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314953233] [2021-03-10 22:28:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:52,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314953233] [2021-03-10 22:28:52,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852543343] [2021-03-10 22:28:52,062 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 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 22:28:52,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:28:52,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:28:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:28:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:52,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:52,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:28:52,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466677899] [2021-03-10 22:28:52,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:28:52,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:52,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:28:52,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:28:52,176 INFO L87 Difference]: Start difference. First operand 125674 states and 275713 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:28:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:52,668 INFO L93 Difference]: Finished difference Result 131872 states and 288047 transitions. [2021-03-10 22:28:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:28:52,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-03-10 22:28:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:52,897 INFO L225 Difference]: With dead ends: 131872 [2021-03-10 22:28:52,897 INFO L226 Difference]: Without dead ends: 131866 [2021-03-10 22:28:52,897 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:28:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-03-10 22:28:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 128726. [2021-03-10 22:28:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128726 states, 128725 states have (on average 2.197374247426685) internal successors, (282857), 128725 states have internal predecessors, (282857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128726 states to 128726 states and 282857 transitions. [2021-03-10 22:28:55,426 INFO L78 Accepts]: Start accepts. Automaton has 128726 states and 282857 transitions. Word has length 76 [2021-03-10 22:28:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:55,426 INFO L480 AbstractCegarLoop]: Abstraction has 128726 states and 282857 transitions. [2021-03-10 22:28:55,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:28:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 128726 states and 282857 transitions. [2021-03-10 22:28:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:28:55,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:55,520 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:28:55,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:28:55,721 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:28:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:28:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash -941503377, now seen corresponding path program 97 times [2021-03-10 22:28:55,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:28:55,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270656566] [2021-03-10 22:28:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:28:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:55,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270656566] [2021-03-10 22:28:55,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453312868] [2021-03-10 22:28:55,760 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 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 22:28:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:28:55,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:28:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:28:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:28:55,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:28:55,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:28:55,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064270634] [2021-03-10 22:28:55,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:28:55,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:28:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:28:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:28:55,875 INFO L87 Difference]: Start difference. First operand 128726 states and 282857 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:28:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:28:56,854 INFO L93 Difference]: Finished difference Result 134932 states and 294145 transitions. [2021-03-10 22:28:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:28:56,867 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-03-10 22:28:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:28:57,085 INFO L225 Difference]: With dead ends: 134932 [2021-03-10 22:28:57,085 INFO L226 Difference]: Without dead ends: 134930 [2021-03-10 22:28:57,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:28:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134930 states. [2021-03-10 22:28:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134930 to 128702. [2021-03-10 22:28:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128702 states, 128701 states have (on average 2.1954841065725983) internal successors, (282561), 128701 states have internal predecessors, (282561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:28:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128702 states to 128702 states and 282561 transitions. [2021-03-10 22:28:59,806 INFO L78 Accepts]: Start accepts. Automaton has 128702 states and 282561 transitions. Word has length 76 [2021-03-10 22:28:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:28:59,806 INFO L480 AbstractCegarLoop]: Abstraction has 128702 states and 282561 transitions. [2021-03-10 22:28:59,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:28:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 128702 states and 282561 transitions. [2021-03-10 22:28:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:28:59,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:28:59,890 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:00,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-03-10 22:29:00,091 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:00,091 INFO L82 PathProgramCache]: Analyzing trace with hash -551299451, now seen corresponding path program 98 times [2021-03-10 22:29:00,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:00,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241798224] [2021-03-10 22:29:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:00,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241798224] [2021-03-10 22:29:00,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409716838] [2021-03-10 22:29:00,133 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 22:29:00,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:00,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:00,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:00,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:00,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:00,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:29:00,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511336205] [2021-03-10 22:29:00,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:29:00,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:00,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:29:00,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:29:00,256 INFO L87 Difference]: Start difference. First operand 128702 states and 282561 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 22:29:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:00,761 INFO L93 Difference]: Finished difference Result 134144 states and 292817 transitions. [2021-03-10 22:29:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:29:00,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 76 [2021-03-10 22:29:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:00,981 INFO L225 Difference]: With dead ends: 134144 [2021-03-10 22:29:00,981 INFO L226 Difference]: Without dead ends: 134142 [2021-03-10 22:29:00,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134142 states. [2021-03-10 22:29:03,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134142 to 128026. [2021-03-10 22:29:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128026 states, 128025 states have (on average 2.1946260495996874) internal successors, (280967), 128025 states have internal predecessors, (280967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:03,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128026 states to 128026 states and 280967 transitions. [2021-03-10 22:29:03,606 INFO L78 Accepts]: Start accepts. Automaton has 128026 states and 280967 transitions. Word has length 76 [2021-03-10 22:29:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:03,606 INFO L480 AbstractCegarLoop]: Abstraction has 128026 states and 280967 transitions. [2021-03-10 22:29:03,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 22:29:03,606 INFO L276 IsEmpty]: Start isEmpty. Operand 128026 states and 280967 transitions. [2021-03-10 22:29:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:03,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:03,707 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:03,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:03,908 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:03,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:03,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1583115929, now seen corresponding path program 99 times [2021-03-10 22:29:03,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:03,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328826773] [2021-03-10 22:29:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:29:03,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328826773] [2021-03-10 22:29:03,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954307069] [2021-03-10 22:29:03,954 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 22:29:03,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:29:03,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:03,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:29:04,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:04,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:29:04,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366842340] [2021-03-10 22:29:04,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:29:04,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:04,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:29:04,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:29:04,079 INFO L87 Difference]: Start difference. First operand 128026 states and 280967 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 22:29:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:05,027 INFO L93 Difference]: Finished difference Result 134843 states and 294803 transitions. [2021-03-10 22:29:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:05,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 76 [2021-03-10 22:29:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:05,308 INFO L225 Difference]: With dead ends: 134843 [2021-03-10 22:29:05,308 INFO L226 Difference]: Without dead ends: 134807 [2021-03-10 22:29:05,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134807 states. [2021-03-10 22:29:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134807 to 131862. [2021-03-10 22:29:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131862 states, 131861 states have (on average 2.1977916138964515) internal successors, (289803), 131861 states have internal predecessors, (289803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:07,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131862 states to 131862 states and 289803 transitions. [2021-03-10 22:29:07,454 INFO L78 Accepts]: Start accepts. Automaton has 131862 states and 289803 transitions. Word has length 76 [2021-03-10 22:29:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:07,454 INFO L480 AbstractCegarLoop]: Abstraction has 131862 states and 289803 transitions. [2021-03-10 22:29:07,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 22:29:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 131862 states and 289803 transitions. [2021-03-10 22:29:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:07,984 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:07,984 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:08,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:08,200 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:08,200 INFO L82 PathProgramCache]: Analyzing trace with hash 128207611, now seen corresponding path program 100 times [2021-03-10 22:29:08,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:08,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660943485] [2021-03-10 22:29:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:08,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660943485] [2021-03-10 22:29:08,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689535122] [2021-03-10 22:29:08,240 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 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 22:29:08,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:08,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:08,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:08,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:08,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:08,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:29:08,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039474254] [2021-03-10 22:29:08,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:29:08,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:08,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:29:08,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:29:08,356 INFO L87 Difference]: Start difference. First operand 131862 states and 289803 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:08,905 INFO L93 Difference]: Finished difference Result 138462 states and 302796 transitions. [2021-03-10 22:29:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:29:08,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-03-10 22:29:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:09,159 INFO L225 Difference]: With dead ends: 138462 [2021-03-10 22:29:09,159 INFO L226 Difference]: Without dead ends: 138426 [2021-03-10 22:29:09,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138426 states. [2021-03-10 22:29:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138426 to 131338. [2021-03-10 22:29:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131338 states, 131337 states have (on average 2.1961747260863276) internal successors, (288439), 131337 states have internal predecessors, (288439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131338 states to 131338 states and 288439 transitions. [2021-03-10 22:29:11,748 INFO L78 Accepts]: Start accepts. Automaton has 131338 states and 288439 transitions. Word has length 76 [2021-03-10 22:29:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:11,749 INFO L480 AbstractCegarLoop]: Abstraction has 131338 states and 288439 transitions. [2021-03-10 22:29:11,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 131338 states and 288439 transitions. [2021-03-10 22:29:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:11,838 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:11,838 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:12,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 22:29:12,039 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:12,039 INFO L82 PathProgramCache]: Analyzing trace with hash 432933231, now seen corresponding path program 101 times [2021-03-10 22:29:12,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:12,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091533325] [2021-03-10 22:29:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:12,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091533325] [2021-03-10 22:29:12,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055579829] [2021-03-10 22:29:12,077 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 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 22:29:12,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:29:12,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:12,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:12,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:12,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:12,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:29:12,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344107622] [2021-03-10 22:29:12,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:29:12,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:12,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:29:12,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:29:12,195 INFO L87 Difference]: Start difference. First operand 131338 states and 288439 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:12,700 INFO L93 Difference]: Finished difference Result 140394 states and 305750 transitions. [2021-03-10 22:29:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:29:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-03-10 22:29:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:12,935 INFO L225 Difference]: With dead ends: 140394 [2021-03-10 22:29:12,935 INFO L226 Difference]: Without dead ends: 140392 [2021-03-10 22:29:12,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140392 states. [2021-03-10 22:29:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140392 to 131550. [2021-03-10 22:29:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131550 states, 131549 states have (on average 2.1950679974762255) internal successors, (288759), 131549 states have internal predecessors, (288759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131550 states to 131550 states and 288759 transitions. [2021-03-10 22:29:15,661 INFO L78 Accepts]: Start accepts. Automaton has 131550 states and 288759 transitions. Word has length 76 [2021-03-10 22:29:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:15,661 INFO L480 AbstractCegarLoop]: Abstraction has 131550 states and 288759 transitions. [2021-03-10 22:29:15,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 131550 states and 288759 transitions. [2021-03-10 22:29:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:16,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:16,194 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:16,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-10 22:29:16,409 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash 823137157, now seen corresponding path program 102 times [2021-03-10 22:29:16,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:16,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981075246] [2021-03-10 22:29:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:16,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981075246] [2021-03-10 22:29:16,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543122205] [2021-03-10 22:29:16,458 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 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 22:29:16,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:29:16,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:16,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:16,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:16,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:16,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:29:16,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446526672] [2021-03-10 22:29:16,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:29:16,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:16,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:29:16,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:29:16,573 INFO L87 Difference]: Start difference. First operand 131550 states and 288759 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 22:29:17,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:17,120 INFO L93 Difference]: Finished difference Result 148818 states and 323300 transitions. [2021-03-10 22:29:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:29:17,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 76 [2021-03-10 22:29:17,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:17,367 INFO L225 Difference]: With dead ends: 148818 [2021-03-10 22:29:17,368 INFO L226 Difference]: Without dead ends: 148800 [2021-03-10 22:29:17,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:29:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148800 states. [2021-03-10 22:29:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148800 to 131506. [2021-03-10 22:29:19,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131506 states, 131505 states have (on average 2.19297365119197) internal successors, (288387), 131505 states have internal predecessors, (288387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131506 states to 131506 states and 288387 transitions. [2021-03-10 22:29:20,001 INFO L78 Accepts]: Start accepts. Automaton has 131506 states and 288387 transitions. Word has length 76 [2021-03-10 22:29:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:20,001 INFO L480 AbstractCegarLoop]: Abstraction has 131506 states and 288387 transitions. [2021-03-10 22:29:20,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 22:29:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 131506 states and 288387 transitions. [2021-03-10 22:29:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:20,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:20,107 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:20,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 22:29:20,307 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:20,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:20,307 INFO L82 PathProgramCache]: Analyzing trace with hash -2018965209, now seen corresponding path program 103 times [2021-03-10 22:29:20,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:20,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934777228] [2021-03-10 22:29:20,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:20,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934777228] [2021-03-10 22:29:20,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294551568] [2021-03-10 22:29:20,355 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 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 22:29:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:20,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:20,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:20,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:20,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:29:20,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207969358] [2021-03-10 22:29:20,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:29:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:29:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:29:20,498 INFO L87 Difference]: Start difference. First operand 131506 states and 288387 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 22:29:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:21,035 INFO L93 Difference]: Finished difference Result 138086 states and 301358 transitions. [2021-03-10 22:29:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:29:21,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 76 [2021-03-10 22:29:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:21,735 INFO L225 Difference]: With dead ends: 138086 [2021-03-10 22:29:21,736 INFO L226 Difference]: Without dead ends: 138068 [2021-03-10 22:29:21,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:29:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138068 states. [2021-03-10 22:29:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138068 to 129102. [2021-03-10 22:29:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129102 states, 129101 states have (on average 2.1923222902998427) internal successors, (283031), 129101 states have internal predecessors, (283031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129102 states to 129102 states and 283031 transitions. [2021-03-10 22:29:23,812 INFO L78 Accepts]: Start accepts. Automaton has 129102 states and 283031 transitions. Word has length 76 [2021-03-10 22:29:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:23,813 INFO L480 AbstractCegarLoop]: Abstraction has 129102 states and 283031 transitions. [2021-03-10 22:29:23,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 22:29:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 129102 states and 283031 transitions. [2021-03-10 22:29:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:23,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:23,908 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:24,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:24,108 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash 974502341, now seen corresponding path program 104 times [2021-03-10 22:29:24,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:24,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096630273] [2021-03-10 22:29:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:29:24,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096630273] [2021-03-10 22:29:24,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981255832] [2021-03-10 22:29:24,145 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:24,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:24,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:24,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:24,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:24,581 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-03-10 22:29:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:29:24,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:24,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:29:24,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83256757] [2021-03-10 22:29:24,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:29:24,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:24,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:29:24,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:29:24,656 INFO L87 Difference]: Start difference. First operand 129102 states and 283031 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 22:29:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:25,130 INFO L93 Difference]: Finished difference Result 135547 states and 296050 transitions. [2021-03-10 22:29:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:25,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 76 [2021-03-10 22:29:25,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:25,352 INFO L225 Difference]: With dead ends: 135547 [2021-03-10 22:29:25,352 INFO L226 Difference]: Without dead ends: 135511 [2021-03-10 22:29:25,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:25,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135511 states. [2021-03-10 22:29:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135511 to 132734. [2021-03-10 22:29:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132734 states, 132733 states have (on average 2.194322436771564) internal successors, (291259), 132733 states have internal predecessors, (291259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132734 states to 132734 states and 291259 transitions. [2021-03-10 22:29:27,884 INFO L78 Accepts]: Start accepts. Automaton has 132734 states and 291259 transitions. Word has length 76 [2021-03-10 22:29:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:27,884 INFO L480 AbstractCegarLoop]: Abstraction has 132734 states and 291259 transitions. [2021-03-10 22:29:27,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 22:29:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 132734 states and 291259 transitions. [2021-03-10 22:29:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:27,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:27,981 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:28,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-10 22:29:28,182 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:28,182 INFO L82 PathProgramCache]: Analyzing trace with hash -14993925, now seen corresponding path program 105 times [2021-03-10 22:29:28,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:28,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381050640] [2021-03-10 22:29:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:28,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381050640] [2021-03-10 22:29:28,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721107903] [2021-03-10 22:29:28,225 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:28,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 22:29:28,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:28,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:28,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:28,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:28,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:29:28,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905928739] [2021-03-10 22:29:28,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:29:28,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:28,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:29:28,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:29:28,344 INFO L87 Difference]: Start difference. First operand 132734 states and 291259 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:28,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:28,889 INFO L93 Difference]: Finished difference Result 139258 states and 304121 transitions. [2021-03-10 22:29:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:29:28,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-03-10 22:29:28,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:29,124 INFO L225 Difference]: With dead ends: 139258 [2021-03-10 22:29:29,125 INFO L226 Difference]: Without dead ends: 139216 [2021-03-10 22:29:29,125 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139216 states. [2021-03-10 22:29:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139216 to 132450. [2021-03-10 22:29:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132450 states, 132449 states have (on average 2.193168691345348) internal successors, (290483), 132449 states have internal predecessors, (290483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132450 states to 132450 states and 290483 transitions. [2021-03-10 22:29:31,756 INFO L78 Accepts]: Start accepts. Automaton has 132450 states and 290483 transitions. Word has length 76 [2021-03-10 22:29:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:31,757 INFO L480 AbstractCegarLoop]: Abstraction has 132450 states and 290483 transitions. [2021-03-10 22:29:31,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:31,757 INFO L276 IsEmpty]: Start isEmpty. Operand 132450 states and 290483 transitions. [2021-03-10 22:29:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:31,857 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:31,857 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:32,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-03-10 22:29:32,058 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:32,058 INFO L82 PathProgramCache]: Analyzing trace with hash 289731695, now seen corresponding path program 106 times [2021-03-10 22:29:32,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:32,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907593701] [2021-03-10 22:29:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:32,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907593701] [2021-03-10 22:29:32,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264280504] [2021-03-10 22:29:32,095 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 22:29:32,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:32,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:32,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:32,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:32,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:29:32,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014058611] [2021-03-10 22:29:32,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:29:32,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:32,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:29:32,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:29:32,212 INFO L87 Difference]: Start difference. First operand 132450 states and 290483 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:33,080 INFO L93 Difference]: Finished difference Result 142694 states and 310513 transitions. [2021-03-10 22:29:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:29:33,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-03-10 22:29:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:33,311 INFO L225 Difference]: With dead ends: 142694 [2021-03-10 22:29:33,311 INFO L226 Difference]: Without dead ends: 142692 [2021-03-10 22:29:33,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142692 states. [2021-03-10 22:29:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142692 to 132698. [2021-03-10 22:29:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132698 states, 132697 states have (on average 2.1928076746271583) internal successors, (290979), 132697 states have internal predecessors, (290979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132698 states to 132698 states and 290979 transitions. [2021-03-10 22:29:35,960 INFO L78 Accepts]: Start accepts. Automaton has 132698 states and 290979 transitions. Word has length 76 [2021-03-10 22:29:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:35,960 INFO L480 AbstractCegarLoop]: Abstraction has 132698 states and 290979 transitions. [2021-03-10 22:29:35,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 132698 states and 290979 transitions. [2021-03-10 22:29:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:36,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:36,059 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:36,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 22:29:36,260 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:36,260 INFO L82 PathProgramCache]: Analyzing trace with hash 679935621, now seen corresponding path program 107 times [2021-03-10 22:29:36,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:36,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133358374] [2021-03-10 22:29:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133358374] [2021-03-10 22:29:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618258501] [2021-03-10 22:29:36,302 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 22:29:36,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:29:36,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:36,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:36,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:36,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:36,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:29:36,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504583094] [2021-03-10 22:29:36,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:29:36,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:36,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:29:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:29:36,420 INFO L87 Difference]: Start difference. First operand 132698 states and 290979 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 22:29:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:36,969 INFO L93 Difference]: Finished difference Result 159426 states and 345883 transitions. [2021-03-10 22:29:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:29:36,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 76 [2021-03-10 22:29:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:37,241 INFO L225 Difference]: With dead ends: 159426 [2021-03-10 22:29:37,241 INFO L226 Difference]: Without dead ends: 159408 [2021-03-10 22:29:37,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:29:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159408 states. [2021-03-10 22:29:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159408 to 133538. [2021-03-10 22:29:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133538 states, 133537 states have (on average 2.1909957539857867) internal successors, (292579), 133537 states have internal predecessors, (292579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133538 states to 133538 states and 292579 transitions. [2021-03-10 22:29:40,005 INFO L78 Accepts]: Start accepts. Automaton has 133538 states and 292579 transitions. Word has length 76 [2021-03-10 22:29:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:40,006 INFO L480 AbstractCegarLoop]: Abstraction has 133538 states and 292579 transitions. [2021-03-10 22:29:40,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 22:29:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 133538 states and 292579 transitions. [2021-03-10 22:29:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:40,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:40,105 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:40,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:40,305 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:40,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2132800551, now seen corresponding path program 108 times [2021-03-10 22:29:40,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:40,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386094707] [2021-03-10 22:29:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:40,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386094707] [2021-03-10 22:29:40,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210627663] [2021-03-10 22:29:40,353 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 22:29:40,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 22:29:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:40,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:40,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:40,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:29:40,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743104645] [2021-03-10 22:29:40,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:29:40,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:40,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:29:40,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:29:40,472 INFO L87 Difference]: Start difference. First operand 133538 states and 292579 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 22:29:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:41,440 INFO L93 Difference]: Finished difference Result 154174 states and 334665 transitions. [2021-03-10 22:29:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:29:41,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 76 [2021-03-10 22:29:41,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:41,699 INFO L225 Difference]: With dead ends: 154174 [2021-03-10 22:29:41,699 INFO L226 Difference]: Without dead ends: 154136 [2021-03-10 22:29:41,699 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:29:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154136 states. [2021-03-10 22:29:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154136 to 133478. [2021-03-10 22:29:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133478 states, 133477 states have (on average 2.1892535792683385) internal successors, (292215), 133477 states have internal predecessors, (292215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133478 states to 133478 states and 292215 transitions. [2021-03-10 22:29:44,395 INFO L78 Accepts]: Start accepts. Automaton has 133478 states and 292215 transitions. Word has length 76 [2021-03-10 22:29:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:44,395 INFO L480 AbstractCegarLoop]: Abstraction has 133478 states and 292215 transitions. [2021-03-10 22:29:44,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 22:29:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 133478 states and 292215 transitions. [2021-03-10 22:29:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:44,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:44,497 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:44,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:44,698 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:44,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:44,698 INFO L82 PathProgramCache]: Analyzing trace with hash 271329285, now seen corresponding path program 109 times [2021-03-10 22:29:44,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:44,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925020635] [2021-03-10 22:29:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:44,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925020635] [2021-03-10 22:29:44,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797553878] [2021-03-10 22:29:44,752 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 22:29:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:44,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:44,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:44,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:44,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 22:29:44,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567346538] [2021-03-10 22:29:44,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:29:44,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:29:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:29:44,873 INFO L87 Difference]: Start difference. First operand 133478 states and 292215 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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 22:29:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:45,430 INFO L93 Difference]: Finished difference Result 139982 states and 305517 transitions. [2021-03-10 22:29:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:29:45,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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 76 [2021-03-10 22:29:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:45,651 INFO L225 Difference]: With dead ends: 139982 [2021-03-10 22:29:45,651 INFO L226 Difference]: Without dead ends: 139944 [2021-03-10 22:29:45,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:29:46,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139944 states. [2021-03-10 22:29:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139944 to 129634. [2021-03-10 22:29:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129634 states, 129633 states have (on average 2.1887250931475783) internal successors, (283731), 129633 states have internal predecessors, (283731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129634 states to 129634 states and 283731 transitions. [2021-03-10 22:29:48,365 INFO L78 Accepts]: Start accepts. Automaton has 129634 states and 283731 transitions. Word has length 76 [2021-03-10 22:29:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:48,365 INFO L480 AbstractCegarLoop]: Abstraction has 129634 states and 283731 transitions. [2021-03-10 22:29:48,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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 22:29:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 129634 states and 283731 transitions. [2021-03-10 22:29:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:48,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:48,457 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:48,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:48,657 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:48,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:48,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1903347815, now seen corresponding path program 110 times [2021-03-10 22:29:48,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:48,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865090644] [2021-03-10 22:29:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:29:48,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865090644] [2021-03-10 22:29:48,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940843214] [2021-03-10 22:29:48,704 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 22:29:48,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:48,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:48,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:48,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:29:48,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:48,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:29:48,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351316752] [2021-03-10 22:29:48,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:29:48,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:48,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:29:48,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:29:48,828 INFO L87 Difference]: Start difference. First operand 129634 states and 283731 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 22:29:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:49,803 INFO L93 Difference]: Finished difference Result 135321 states and 295193 transitions. [2021-03-10 22:29:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:49,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 76 [2021-03-10 22:29:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:50,008 INFO L225 Difference]: With dead ends: 135321 [2021-03-10 22:29:50,009 INFO L226 Difference]: Without dead ends: 135249 [2021-03-10 22:29:50,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135249 states. [2021-03-10 22:29:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135249 to 123270. [2021-03-10 22:29:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123270 states, 123269 states have (on average 2.185910488443972) internal successors, (269455), 123269 states have internal predecessors, (269455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123270 states to 123270 states and 269455 transitions. [2021-03-10 22:29:52,062 INFO L78 Accepts]: Start accepts. Automaton has 123270 states and 269455 transitions. Word has length 76 [2021-03-10 22:29:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:52,062 INFO L480 AbstractCegarLoop]: Abstraction has 123270 states and 269455 transitions. [2021-03-10 22:29:52,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 22:29:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 123270 states and 269455 transitions. [2021-03-10 22:29:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:52,157 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:52,157 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:52,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 22:29:52,358 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:52,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1486828283, now seen corresponding path program 111 times [2021-03-10 22:29:52,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:52,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659127284] [2021-03-10 22:29:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:52,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659127284] [2021-03-10 22:29:52,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565349152] [2021-03-10 22:29:52,395 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 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 22:29:52,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 22:29:52,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:52,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:52,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:52,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:29:52,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687059299] [2021-03-10 22:29:52,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:29:52,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:52,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:29:52,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:29:52,533 INFO L87 Difference]: Start difference. First operand 123270 states and 269455 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:53,437 INFO L93 Difference]: Finished difference Result 128955 states and 280766 transitions. [2021-03-10 22:29:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:29:53,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-03-10 22:29:53,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:53,639 INFO L225 Difference]: With dead ends: 128955 [2021-03-10 22:29:53,639 INFO L226 Difference]: Without dead ends: 128913 [2021-03-10 22:29:53,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128913 states. [2021-03-10 22:29:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128913 to 122990. [2021-03-10 22:29:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122990 states, 122989 states have (on average 2.185553179552643) internal successors, (268799), 122989 states have internal predecessors, (268799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122990 states to 122990 states and 268799 transitions. [2021-03-10 22:29:56,133 INFO L78 Accepts]: Start accepts. Automaton has 122990 states and 268799 transitions. Word has length 76 [2021-03-10 22:29:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:56,133 INFO L480 AbstractCegarLoop]: Abstraction has 122990 states and 268799 transitions. [2021-03-10 22:29:56,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 122990 states and 268799 transitions. [2021-03-10 22:29:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:56,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:56,208 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:56,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-10 22:29:56,409 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1791553903, now seen corresponding path program 112 times [2021-03-10 22:29:56,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:56,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327627812] [2021-03-10 22:29:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:56,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327627812] [2021-03-10 22:29:56,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947095607] [2021-03-10 22:29:56,446 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 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 22:29:56,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:56,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:56,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:56,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:56,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:56,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:29:56,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365850465] [2021-03-10 22:29:56,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:29:56,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:56,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:29:56,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:29:56,560 INFO L87 Difference]: Start difference. First operand 122990 states and 268799 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:57,015 INFO L93 Difference]: Finished difference Result 130997 states and 284211 transitions. [2021-03-10 22:29:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:29:57,016 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-03-10 22:29:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:57,226 INFO L225 Difference]: With dead ends: 130997 [2021-03-10 22:29:57,226 INFO L226 Difference]: Without dead ends: 130997 [2021-03-10 22:29:57,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:57,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130997 states. [2021-03-10 22:29:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130997 to 123134. [2021-03-10 22:29:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123134 states, 123133 states have (on average 2.1853036960035084) internal successors, (269083), 123133 states have internal predecessors, (269083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123134 states to 123134 states and 269083 transitions. [2021-03-10 22:29:59,579 INFO L78 Accepts]: Start accepts. Automaton has 123134 states and 269083 transitions. Word has length 76 [2021-03-10 22:29:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:59,579 INFO L480 AbstractCegarLoop]: Abstraction has 123134 states and 269083 transitions. [2021-03-10 22:29:59,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:29:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 123134 states and 269083 transitions. [2021-03-10 22:29:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:29:59,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:59,668 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:59,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 22:29:59,869 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:59,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2113209467, now seen corresponding path program 113 times [2021-03-10 22:29:59,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:59,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680235655] [2021-03-10 22:29:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:29:59,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680235655] [2021-03-10 22:29:59,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282934812] [2021-03-10 22:29:59,912 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 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 22:29:59,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 22:29:59,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:59,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:29:59,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:30:00,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:00,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:30:00,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601819106] [2021-03-10 22:30:00,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:30:00,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:00,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:30:00,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:30:00,045 INFO L87 Difference]: Start difference. First operand 123134 states and 269083 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 22:30:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:00,606 INFO L93 Difference]: Finished difference Result 145897 states and 315475 transitions. [2021-03-10 22:30:00,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:30:00,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 76 [2021-03-10 22:30:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:00,856 INFO L225 Difference]: With dead ends: 145897 [2021-03-10 22:30:00,857 INFO L226 Difference]: Without dead ends: 145897 [2021-03-10 22:30:00,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:30:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145897 states. [2021-03-10 22:30:03,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145897 to 123934. [2021-03-10 22:30:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123934 states, 123933 states have (on average 2.184720776548619) internal successors, (270759), 123933 states have internal predecessors, (270759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123934 states to 123934 states and 270759 transitions. [2021-03-10 22:30:03,424 INFO L78 Accepts]: Start accepts. Automaton has 123934 states and 270759 transitions. Word has length 76 [2021-03-10 22:30:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:03,424 INFO L480 AbstractCegarLoop]: Abstraction has 123934 states and 270759 transitions. [2021-03-10 22:30:03,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 22:30:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 123934 states and 270759 transitions. [2021-03-10 22:30:03,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:30:03,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:03,519 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:03,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 22:30:03,720 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:03,720 INFO L82 PathProgramCache]: Analyzing trace with hash -660344537, now seen corresponding path program 114 times [2021-03-10 22:30:03,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:03,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099193716] [2021-03-10 22:30:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:30:03,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099193716] [2021-03-10 22:30:03,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447600661] [2021-03-10 22:30:03,769 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 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 22:30:03,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 22:30:03,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:03,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:30:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:30:03,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:03,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:30:03,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668465780] [2021-03-10 22:30:03,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:03,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:03,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:03,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:03,905 INFO L87 Difference]: Start difference. First operand 123934 states and 270759 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 22:30:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:04,969 INFO L93 Difference]: Finished difference Result 146309 states and 316555 transitions. [2021-03-10 22:30:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:30:04,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 76 [2021-03-10 22:30:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:05,206 INFO L225 Difference]: With dead ends: 146309 [2021-03-10 22:30:05,206 INFO L226 Difference]: Without dead ends: 146309 [2021-03-10 22:30:05,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:30:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146309 states. [2021-03-10 22:30:06,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146309 to 124414. [2021-03-10 22:30:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124414 states, 124413 states have (on average 2.1839438000852) internal successors, (271711), 124413 states have internal predecessors, (271711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124414 states to 124414 states and 271711 transitions. [2021-03-10 22:30:07,385 INFO L78 Accepts]: Start accepts. Automaton has 124414 states and 271711 transitions. Word has length 76 [2021-03-10 22:30:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:07,385 INFO L480 AbstractCegarLoop]: Abstraction has 124414 states and 271711 transitions. [2021-03-10 22:30:07,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 22:30:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 124414 states and 271711 transitions. [2021-03-10 22:30:07,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:30:07,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:07,481 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:07,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-03-10 22:30:07,683 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:07,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1773151493, now seen corresponding path program 115 times [2021-03-10 22:30:07,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:07,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926332613] [2021-03-10 22:30:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:30:08,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926332613] [2021-03-10 22:30:08,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357768556] [2021-03-10 22:30:08,162 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 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 22:30:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:30:08,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:30:08,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:08,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 22:30:08,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842897123] [2021-03-10 22:30:08,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:08,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:08,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:08,300 INFO L87 Difference]: Start difference. First operand 124414 states and 271711 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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 22:30:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:08,832 INFO L93 Difference]: Finished difference Result 138029 states and 299093 transitions. [2021-03-10 22:30:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:30:08,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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 76 [2021-03-10 22:30:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:09,048 INFO L225 Difference]: With dead ends: 138029 [2021-03-10 22:30:09,048 INFO L226 Difference]: Without dead ends: 138029 [2021-03-10 22:30:09,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:30:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138029 states. [2021-03-10 22:30:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138029 to 123854. [2021-03-10 22:30:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123854 states, 123853 states have (on average 2.1827085335034275) internal successors, (270335), 123853 states have internal predecessors, (270335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123854 states to 123854 states and 270335 transitions. [2021-03-10 22:30:11,552 INFO L78 Accepts]: Start accepts. Automaton has 123854 states and 270335 transitions. Word has length 76 [2021-03-10 22:30:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:11,553 INFO L480 AbstractCegarLoop]: Abstraction has 123854 states and 270335 transitions. [2021-03-10 22:30:11,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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 22:30:11,553 INFO L276 IsEmpty]: Start isEmpty. Operand 123854 states and 270335 transitions. [2021-03-10 22:30:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:30:11,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:11,639 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:11,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:11,841 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2048129063, now seen corresponding path program 116 times [2021-03-10 22:30:11,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:11,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311106974] [2021-03-10 22:30:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:11,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311106974] [2021-03-10 22:30:11,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737654784] [2021-03-10 22:30:11,905 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 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 22:30:11,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:11,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:11,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:30:11,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:12,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:12,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 22:30:12,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404683464] [2021-03-10 22:30:12,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:30:12,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:12,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:30:12,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:30:12,025 INFO L87 Difference]: Start difference. First operand 123854 states and 270335 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 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 22:30:12,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:12,554 INFO L93 Difference]: Finished difference Result 128519 states and 279224 transitions. [2021-03-10 22:30:12,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:30:12,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 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 76 [2021-03-10 22:30:12,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:12,778 INFO L225 Difference]: With dead ends: 128519 [2021-03-10 22:30:12,778 INFO L226 Difference]: Without dead ends: 128519 [2021-03-10 22:30:12,778 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:30:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128519 states. [2021-03-10 22:30:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128519 to 117206. [2021-03-10 22:30:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117206 states, 117205 states have (on average 2.179659570837422) internal successors, (255467), 117205 states have internal predecessors, (255467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117206 states to 117206 states and 255467 transitions. [2021-03-10 22:30:15,147 INFO L78 Accepts]: Start accepts. Automaton has 117206 states and 255467 transitions. Word has length 76 [2021-03-10 22:30:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:15,147 INFO L480 AbstractCegarLoop]: Abstraction has 117206 states and 255467 transitions. [2021-03-10 22:30:15,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 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 22:30:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 117206 states and 255467 transitions. [2021-03-10 22:30:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:30:15,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:15,242 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:15,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-03-10 22:30:15,443 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:15,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:15,443 INFO L82 PathProgramCache]: Analyzing trace with hash -358200709, now seen corresponding path program 117 times [2021-03-10 22:30:15,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:15,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206422951] [2021-03-10 22:30:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:30:15,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206422951] [2021-03-10 22:30:15,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122495339] [2021-03-10 22:30:15,503 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 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 22:30:15,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 22:30:15,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:15,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:30:15,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:30:15,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:15,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 22:30:15,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130552162] [2021-03-10 22:30:15,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:30:15,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:15,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:30:15,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:15,619 INFO L87 Difference]: Start difference. First operand 117206 states and 255467 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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 22:30:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:16,188 INFO L93 Difference]: Finished difference Result 128191 states and 279004 transitions. [2021-03-10 22:30:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:30:16,189 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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 76 [2021-03-10 22:30:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:16,399 INFO L225 Difference]: With dead ends: 128191 [2021-03-10 22:30:16,399 INFO L226 Difference]: Without dead ends: 128065 [2021-03-10 22:30:16,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:30:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128065 states. [2021-03-10 22:30:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128065 to 122126. [2021-03-10 22:30:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.1861780962128967) internal successors, (266987), 122125 states have internal predecessors, (266987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266987 transitions. [2021-03-10 22:30:18,712 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266987 transitions. Word has length 76 [2021-03-10 22:30:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:18,712 INFO L480 AbstractCegarLoop]: Abstraction has 122126 states and 266987 transitions. [2021-03-10 22:30:18,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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 22:30:18,712 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266987 transitions. [2021-03-10 22:30:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:30:18,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:18,793 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:18,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-03-10 22:30:18,994 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:18,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1595890949, now seen corresponding path program 118 times [2021-03-10 22:30:18,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:18,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815693872] [2021-03-10 22:30:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 22:30:19,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815693872] [2021-03-10 22:30:19,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321124780] [2021-03-10 22:30:19,043 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 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 22:30:19,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:19,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:30:19,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 22:30:19,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:19,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:30:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669780284] [2021-03-10 22:30:19,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:19,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:19,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:19,164 INFO L87 Difference]: Start difference. First operand 122126 states and 266987 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 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 22:30:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:19,657 INFO L93 Difference]: Finished difference Result 124343 states and 270490 transitions. [2021-03-10 22:30:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 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 76 [2021-03-10 22:30:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:19,856 INFO L225 Difference]: With dead ends: 124343 [2021-03-10 22:30:19,856 INFO L226 Difference]: Without dead ends: 124247 [2021-03-10 22:30:19,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:20,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124247 states. [2021-03-10 22:30:21,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124247 to 122126. [2021-03-10 22:30:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185523029682702) internal successors, (266907), 122125 states have internal predecessors, (266907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266907 transitions. [2021-03-10 22:30:22,371 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266907 transitions. Word has length 76 [2021-03-10 22:30:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:22,371 INFO L480 AbstractCegarLoop]: Abstraction has 122126 states and 266907 transitions. [2021-03-10 22:30:22,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 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 22:30:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266907 transitions. [2021-03-10 22:30:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:30:22,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:22,462 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:22,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:22,667 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1654539205, now seen corresponding path program 119 times [2021-03-10 22:30:22,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:22,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575880597] [2021-03-10 22:30:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:30:22,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575880597] [2021-03-10 22:30:22,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490887954] [2021-03-10 22:30:22,710 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 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 22:30:22,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 22:30:22,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:30:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:30:22,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:22,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:30:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200136902] [2021-03-10 22:30:22,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:30:22,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:22,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:30:22,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:30:22,825 INFO L87 Difference]: Start difference. First operand 122126 states and 266907 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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 22:30:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:23,663 INFO L93 Difference]: Finished difference Result 123893 states and 269670 transitions. [2021-03-10 22:30:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:30:23,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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 76 [2021-03-10 22:30:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:23,868 INFO L225 Difference]: With dead ends: 123893 [2021-03-10 22:30:23,868 INFO L226 Difference]: Without dead ends: 123827 [2021-03-10 22:30:23,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123827 states. [2021-03-10 22:30:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123827 to 122126. [2021-03-10 22:30:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185195496417605) internal successors, (266867), 122125 states have internal predecessors, (266867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266867 transitions. [2021-03-10 22:30:25,950 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266867 transitions. Word has length 76 [2021-03-10 22:30:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:25,951 INFO L480 AbstractCegarLoop]: Abstraction has 122126 states and 266867 transitions. [2021-03-10 22:30:25,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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 22:30:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266867 transitions. [2021-03-10 22:30:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:30:26,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:26,046 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:26,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:26,246 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:26,247 INFO L82 PathProgramCache]: Analyzing trace with hash 189567813, now seen corresponding path program 120 times [2021-03-10 22:30:26,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:26,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847632596] [2021-03-10 22:30:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:30:26,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847632596] [2021-03-10 22:30:26,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631002522] [2021-03-10 22:30:26,294 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 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 22:30:26,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 22:30:26,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:26,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 22:30:26,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-03-10 22:30:26,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:26,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-03-10 22:30:26,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450105929] [2021-03-10 22:30:26,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:26,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:26,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:26,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:26,885 INFO L87 Difference]: Start difference. First operand 122126 states and 266867 transitions. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:28,437 INFO L93 Difference]: Finished difference Result 203383 states and 440408 transitions. [2021-03-10 22:30:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-10 22:30:28,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-03-10 22:30:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:28,802 INFO L225 Difference]: With dead ends: 203383 [2021-03-10 22:30:28,802 INFO L226 Difference]: Without dead ends: 203092 [2021-03-10 22:30:28,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 674.8ms TimeCoverageRelationStatistics Valid=782, Invalid=6190, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 22:30:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203092 states. [2021-03-10 22:30:31,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203092 to 153026. [2021-03-10 22:30:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153026 states, 153025 states have (on average 2.1853487992158143) internal successors, (334413), 153025 states have internal predecessors, (334413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153026 states to 153026 states and 334413 transitions. [2021-03-10 22:30:32,482 INFO L78 Accepts]: Start accepts. Automaton has 153026 states and 334413 transitions. Word has length 76 [2021-03-10 22:30:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:32,482 INFO L480 AbstractCegarLoop]: Abstraction has 153026 states and 334413 transitions. [2021-03-10 22:30:32,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 153026 states and 334413 transitions. [2021-03-10 22:30:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-03-10 22:30:32,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:32,591 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:32,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:32,799 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1785917094, now seen corresponding path program 121 times [2021-03-10 22:30:32,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:32,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559659576] [2021-03-10 22:30:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 144 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:32,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559659576] [2021-03-10 22:30:32,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837920590] [2021-03-10 22:30:32,887 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 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 22:30:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:32,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:30:32,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 114 proven. 41 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-03-10 22:30:32,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:32,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 15 [2021-03-10 22:30:32,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993827187] [2021-03-10 22:30:32,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:30:32,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:32,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:30:32,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:30:32,995 INFO L87 Difference]: Start difference. First operand 153026 states and 334413 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 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 22:30:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:33,613 INFO L93 Difference]: Finished difference Result 163078 states and 354025 transitions. [2021-03-10 22:30:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:30:33,614 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 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 76 [2021-03-10 22:30:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:33,879 INFO L225 Difference]: With dead ends: 163078 [2021-03-10 22:30:33,880 INFO L226 Difference]: Without dead ends: 162830 [2021-03-10 22:30:33,880 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:30:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162830 states. [2021-03-10 22:30:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162830 to 153130. [2021-03-10 22:30:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153130 states, 153129 states have (on average 2.1844392636273993) internal successors, (334501), 153129 states have internal predecessors, (334501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153130 states to 153130 states and 334501 transitions. [2021-03-10 22:30:36,734 INFO L78 Accepts]: Start accepts. Automaton has 153130 states and 334501 transitions. Word has length 76 [2021-03-10 22:30:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:36,734 INFO L480 AbstractCegarLoop]: Abstraction has 153130 states and 334501 transitions. [2021-03-10 22:30:36,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 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 22:30:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 153130 states and 334501 transitions. [2021-03-10 22:30:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:30:36,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:36,895 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:37,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-10 22:30:37,096 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:37,096 INFO L82 PathProgramCache]: Analyzing trace with hash -316262490, now seen corresponding path program 122 times [2021-03-10 22:30:37,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:37,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400579762] [2021-03-10 22:30:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:37,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400579762] [2021-03-10 22:30:37,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122151103] [2021-03-10 22:30:37,199 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 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 22:30:37,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:37,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:37,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:30:37,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:37,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:37,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-03-10 22:30:37,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503872918] [2021-03-10 22:30:37,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:30:37,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:37,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:30:37,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:30:37,330 INFO L87 Difference]: Start difference. First operand 153130 states and 334501 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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 22:30:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:38,614 INFO L93 Difference]: Finished difference Result 169486 states and 368744 transitions. [2021-03-10 22:30:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:38,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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 86 [2021-03-10 22:30:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:38,890 INFO L225 Difference]: With dead ends: 169486 [2021-03-10 22:30:38,890 INFO L226 Difference]: Without dead ends: 169486 [2021-03-10 22:30:38,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 683.3ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:30:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169486 states. [2021-03-10 22:30:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169486 to 157008. [2021-03-10 22:30:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157008 states, 157007 states have (on average 2.18660951422548) internal successors, (343313), 157007 states have internal predecessors, (343313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157008 states to 157008 states and 343313 transitions. [2021-03-10 22:30:41,923 INFO L78 Accepts]: Start accepts. Automaton has 157008 states and 343313 transitions. Word has length 86 [2021-03-10 22:30:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:41,923 INFO L480 AbstractCegarLoop]: Abstraction has 157008 states and 343313 transitions. [2021-03-10 22:30:41,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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 22:30:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 157008 states and 343313 transitions. [2021-03-10 22:30:42,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:30:42,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:42,085 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:42,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 22:30:42,286 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash -342094170, now seen corresponding path program 123 times [2021-03-10 22:30:42,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:42,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203553230] [2021-03-10 22:30:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:42,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203553230] [2021-03-10 22:30:42,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024763973] [2021-03-10 22:30:42,341 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 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 22:30:42,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 22:30:42,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:42,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:30:42,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:42,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:42,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:30:42,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284875472] [2021-03-10 22:30:42,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:30:42,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:42,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:30:42,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:30:42,483 INFO L87 Difference]: Start difference. First operand 157008 states and 343313 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 22:30:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:43,672 INFO L93 Difference]: Finished difference Result 159720 states and 347802 transitions. [2021-03-10 22:30:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:30:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 86 [2021-03-10 22:30:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:43,934 INFO L225 Difference]: With dead ends: 159720 [2021-03-10 22:30:43,934 INFO L226 Difference]: Without dead ends: 159716 [2021-03-10 22:30:43,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:30:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159716 states. [2021-03-10 22:30:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159716 to 154858. [2021-03-10 22:30:46,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154858 states, 154857 states have (on average 2.1844734174109015) internal successors, (338281), 154857 states have internal predecessors, (338281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154858 states to 154858 states and 338281 transitions. [2021-03-10 22:30:46,908 INFO L78 Accepts]: Start accepts. Automaton has 154858 states and 338281 transitions. Word has length 86 [2021-03-10 22:30:46,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:46,908 INFO L480 AbstractCegarLoop]: Abstraction has 154858 states and 338281 transitions. [2021-03-10 22:30:46,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 22:30:46,908 INFO L276 IsEmpty]: Start isEmpty. Operand 154858 states and 338281 transitions. [2021-03-10 22:30:47,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:30:47,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:47,075 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:47,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:47,276 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:47,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:47,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1880023924, now seen corresponding path program 124 times [2021-03-10 22:30:47,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:47,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971330095] [2021-03-10 22:30:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 154 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:47,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971330095] [2021-03-10 22:30:47,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948015890] [2021-03-10 22:30:47,334 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 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 22:30:47,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:47,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:47,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:30:47,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 150 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:30:47,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:47,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2021-03-10 22:30:47,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357739334] [2021-03-10 22:30:47,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:47,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:47,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:47,515 INFO L87 Difference]: Start difference. First operand 154858 states and 338281 transitions. Second operand has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 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 22:30:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:49,018 INFO L93 Difference]: Finished difference Result 164918 states and 359351 transitions. [2021-03-10 22:30:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:49,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 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 86 [2021-03-10 22:30:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:49,364 INFO L225 Difference]: With dead ends: 164918 [2021-03-10 22:30:49,364 INFO L226 Difference]: Without dead ends: 164914 [2021-03-10 22:30:49,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:30:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164914 states. [2021-03-10 22:30:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164914 to 155138. [2021-03-10 22:30:51,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155138 states, 155137 states have (on average 2.1851718158788684) internal successors, (339001), 155137 states have internal predecessors, (339001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155138 states to 155138 states and 339001 transitions. [2021-03-10 22:30:52,267 INFO L78 Accepts]: Start accepts. Automaton has 155138 states and 339001 transitions. Word has length 86 [2021-03-10 22:30:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:52,267 INFO L480 AbstractCegarLoop]: Abstraction has 155138 states and 339001 transitions. [2021-03-10 22:30:52,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 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 22:30:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 155138 states and 339001 transitions. [2021-03-10 22:30:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:30:52,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:52,428 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:52,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-10 22:30:52,629 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:52,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:52,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1015661798, now seen corresponding path program 125 times [2021-03-10 22:30:52,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:52,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497784962] [2021-03-10 22:30:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:52,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497784962] [2021-03-10 22:30:52,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472053728] [2021-03-10 22:30:52,684 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 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 22:30:52,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 22:30:52,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:52,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:30:52,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 146 proven. 87 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-10 22:30:52,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:52,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2021-03-10 22:30:52,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230855497] [2021-03-10 22:30:52,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:52,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:52,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:52,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:52,874 INFO L87 Difference]: Start difference. First operand 155138 states and 339001 transitions. Second operand has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:53,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:53,768 INFO L93 Difference]: Finished difference Result 162401 states and 354857 transitions. [2021-03-10 22:30:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:30:53,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-03-10 22:30:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:54,029 INFO L225 Difference]: With dead ends: 162401 [2021-03-10 22:30:54,029 INFO L226 Difference]: Without dead ends: 162246 [2021-03-10 22:30:54,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=458, Invalid=1102, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:30:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162246 states. [2021-03-10 22:30:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162246 to 154498. [2021-03-10 22:30:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154498 states, 154497 states have (on average 2.185110390493019) internal successors, (337593), 154497 states have internal predecessors, (337593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154498 states to 154498 states and 337593 transitions. [2021-03-10 22:30:57,390 INFO L78 Accepts]: Start accepts. Automaton has 154498 states and 337593 transitions. Word has length 86 [2021-03-10 22:30:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:57,390 INFO L480 AbstractCegarLoop]: Abstraction has 154498 states and 337593 transitions. [2021-03-10 22:30:57,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 154498 states and 337593 transitions. [2021-03-10 22:30:57,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:30:57,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:57,545 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:57,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-03-10 22:30:57,759 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:57,759 INFO L82 PathProgramCache]: Analyzing trace with hash 381795686, now seen corresponding path program 126 times [2021-03-10 22:30:57,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:57,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205548117] [2021-03-10 22:30:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:30:57,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205548117] [2021-03-10 22:30:57,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550683092] [2021-03-10 22:30:57,804 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) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:57,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 22:30:57,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:57,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:30:57,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:30:57,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:57,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 22:30:57,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422662626] [2021-03-10 22:30:57,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:30:57,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:57,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:30:57,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:30:57,944 INFO L87 Difference]: Start difference. First operand 154498 states and 337593 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:30:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:58,538 INFO L93 Difference]: Finished difference Result 187447 states and 406719 transitions. [2021-03-10 22:30:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:30:58,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 86 [2021-03-10 22:30:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:58,832 INFO L225 Difference]: With dead ends: 187447 [2021-03-10 22:30:58,832 INFO L226 Difference]: Without dead ends: 187447 [2021-03-10 22:30:58,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:30:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187447 states. [2021-03-10 22:31:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187447 to 159330. [2021-03-10 22:31:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159330 states, 159329 states have (on average 2.1893126800519678) internal successors, (348821), 159329 states have internal predecessors, (348821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159330 states to 159330 states and 348821 transitions. [2021-03-10 22:31:02,111 INFO L78 Accepts]: Start accepts. Automaton has 159330 states and 348821 transitions. Word has length 86 [2021-03-10 22:31:02,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:02,111 INFO L480 AbstractCegarLoop]: Abstraction has 159330 states and 348821 transitions. [2021-03-10 22:31:02,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 22:31:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 159330 states and 348821 transitions. [2021-03-10 22:31:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:31:02,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:02,800 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:03,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-10 22:31:03,015 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:03,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1887951014, now seen corresponding path program 127 times [2021-03-10 22:31:03,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:03,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203096782] [2021-03-10 22:31:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 110 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:31:03,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203096782] [2021-03-10 22:31:03,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412636369] [2021-03-10 22:31:03,056 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 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 22:31:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:31:03,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 22:31:03,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:03,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 22:31:03,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581724764] [2021-03-10 22:31:03,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:31:03,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:03,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:31:03,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:31:03,185 INFO L87 Difference]: Start difference. First operand 159330 states and 348821 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 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 22:31:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:03,818 INFO L93 Difference]: Finished difference Result 195387 states and 423182 transitions. [2021-03-10 22:31:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:31:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 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 86 [2021-03-10 22:31:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:04,102 INFO L225 Difference]: With dead ends: 195387 [2021-03-10 22:31:04,102 INFO L226 Difference]: Without dead ends: 195323 [2021-03-10 22:31:04,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195323 states. [2021-03-10 22:31:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195323 to 159302. [2021-03-10 22:31:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159302 states, 159301 states have (on average 2.1885926642017313) internal successors, (348645), 159301 states have internal predecessors, (348645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159302 states to 159302 states and 348645 transitions. [2021-03-10 22:31:07,528 INFO L78 Accepts]: Start accepts. Automaton has 159302 states and 348645 transitions. Word has length 86 [2021-03-10 22:31:07,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:07,529 INFO L480 AbstractCegarLoop]: Abstraction has 159302 states and 348645 transitions. [2021-03-10 22:31:07,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 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 22:31:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 159302 states and 348645 transitions. [2021-03-10 22:31:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:31:07,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:07,740 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:07,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:07,940 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash -565732340, now seen corresponding path program 128 times [2021-03-10 22:31:07,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:07,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357854007] [2021-03-10 22:31:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 101 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:31:07,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357854007] [2021-03-10 22:31:07,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234864313] [2021-03-10 22:31:07,985 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 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 22:31:08,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:31:08,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 131 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 22:31:08,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:08,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 22:31:08,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857832578] [2021-03-10 22:31:08,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:08,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:08,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:08,113 INFO L87 Difference]: Start difference. First operand 159302 states and 348645 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 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 22:31:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:08,742 INFO L93 Difference]: Finished difference Result 177150 states and 384101 transitions. [2021-03-10 22:31:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:31:08,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 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 86 [2021-03-10 22:31:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:08,990 INFO L225 Difference]: With dead ends: 177150 [2021-03-10 22:31:08,990 INFO L226 Difference]: Without dead ends: 177126 [2021-03-10 22:31:08,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:31:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177126 states. [2021-03-10 22:31:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177126 to 159386. [2021-03-10 22:31:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159386 states, 159385 states have (on average 2.1882674028296263) internal successors, (348777), 159385 states have internal predecessors, (348777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159386 states to 159386 states and 348777 transitions. [2021-03-10 22:31:11,931 INFO L78 Accepts]: Start accepts. Automaton has 159386 states and 348777 transitions. Word has length 86 [2021-03-10 22:31:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:11,931 INFO L480 AbstractCegarLoop]: Abstraction has 159386 states and 348777 transitions. [2021-03-10 22:31:11,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 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 22:31:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 159386 states and 348777 transitions. [2021-03-10 22:31:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:31:12,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:12,497 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:12,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:12,711 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:12,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2093645926, now seen corresponding path program 129 times [2021-03-10 22:31:12,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:12,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302287643] [2021-03-10 22:31:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 104 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:31:12,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302287643] [2021-03-10 22:31:12,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852128127] [2021-03-10 22:31:12,761 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 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 22:31:12,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 22:31:12,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:12,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:31:12,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-03-10 22:31:12,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:12,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-03-10 22:31:12,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446754866] [2021-03-10 22:31:12,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:12,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:12,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:12,986 INFO L87 Difference]: Start difference. First operand 159386 states and 348777 transitions. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:15,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:15,545 INFO L93 Difference]: Finished difference Result 275251 states and 593414 transitions. [2021-03-10 22:31:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-03-10 22:31:15,545 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-03-10 22:31:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:15,933 INFO L225 Difference]: With dead ends: 275251 [2021-03-10 22:31:15,934 INFO L226 Difference]: Without dead ends: 275139 [2021-03-10 22:31:15,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 935.3ms TimeCoverageRelationStatistics Valid=1037, Invalid=10519, Unknown=0, NotChecked=0, Total=11556 [2021-03-10 22:31:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275139 states. [2021-03-10 22:31:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275139 to 204668. [2021-03-10 22:31:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204668 states, 204667 states have (on average 2.1685713866915526) internal successors, (443835), 204667 states have internal predecessors, (443835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204668 states to 204668 states and 443835 transitions. [2021-03-10 22:31:19,829 INFO L78 Accepts]: Start accepts. Automaton has 204668 states and 443835 transitions. Word has length 86 [2021-03-10 22:31:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:19,829 INFO L480 AbstractCegarLoop]: Abstraction has 204668 states and 443835 transitions. [2021-03-10 22:31:19,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 204668 states and 443835 transitions. [2021-03-10 22:31:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:31:19,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:19,981 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:20,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:20,181 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:20,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1967004549, now seen corresponding path program 130 times [2021-03-10 22:31:20,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:20,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063379428] [2021-03-10 22:31:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 196 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:20,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063379428] [2021-03-10 22:31:20,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178030760] [2021-03-10 22:31:20,240 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 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 22:31:20,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:20,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:31:20,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 144 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:31:20,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:20,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2021-03-10 22:31:20,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428935858] [2021-03-10 22:31:20,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:31:20,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:20,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:31:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:31:20,425 INFO L87 Difference]: Start difference. First operand 204668 states and 443835 transitions. Second operand has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:22,041 INFO L93 Difference]: Finished difference Result 247113 states and 534129 transitions. [2021-03-10 22:31:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:31:22,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-03-10 22:31:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:22,430 INFO L225 Difference]: With dead ends: 247113 [2021-03-10 22:31:22,430 INFO L226 Difference]: Without dead ends: 247095 [2021-03-10 22:31:22,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:31:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247095 states. [2021-03-10 22:31:25,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247095 to 223232. [2021-03-10 22:31:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223232 states, 223231 states have (on average 2.1722565414301775) internal successors, (484915), 223231 states have internal predecessors, (484915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223232 states to 223232 states and 484915 transitions. [2021-03-10 22:31:26,421 INFO L78 Accepts]: Start accepts. Automaton has 223232 states and 484915 transitions. Word has length 86 [2021-03-10 22:31:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:26,421 INFO L480 AbstractCegarLoop]: Abstraction has 223232 states and 484915 transitions. [2021-03-10 22:31:26,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 223232 states and 484915 transitions. [2021-03-10 22:31:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:31:26,587 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:26,587 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:26,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-03-10 22:31:26,787 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:26,788 INFO L82 PathProgramCache]: Analyzing trace with hash 454346087, now seen corresponding path program 131 times [2021-03-10 22:31:26,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:26,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319176567] [2021-03-10 22:31:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 106 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:31:26,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319176567] [2021-03-10 22:31:26,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996443769] [2021-03-10 22:31:26,864 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 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 22:31:26,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:31:26,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:26,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:31:26,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-03-10 22:31:26,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:26,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 22:31:26,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866171828] [2021-03-10 22:31:26,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:31:26,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:26,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:31:26,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:31:26,989 INFO L87 Difference]: Start difference. First operand 223232 states and 484915 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 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 22:31:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:28,415 INFO L93 Difference]: Finished difference Result 226999 states and 490880 transitions. [2021-03-10 22:31:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:31:28,416 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 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 86 [2021-03-10 22:31:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:28,765 INFO L225 Difference]: With dead ends: 226999 [2021-03-10 22:31:28,765 INFO L226 Difference]: Without dead ends: 226645 [2021-03-10 22:31:28,765 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:31:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226645 states. [2021-03-10 22:31:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226645 to 217428. [2021-03-10 22:31:32,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217428 states, 217427 states have (on average 2.1668835977132557) internal successors, (471139), 217427 states have internal predecessors, (471139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217428 states to 217428 states and 471139 transitions. [2021-03-10 22:31:32,851 INFO L78 Accepts]: Start accepts. Automaton has 217428 states and 471139 transitions. Word has length 86 [2021-03-10 22:31:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:32,851 INFO L480 AbstractCegarLoop]: Abstraction has 217428 states and 471139 transitions. [2021-03-10 22:31:32,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 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 22:31:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 217428 states and 471139 transitions. [2021-03-10 22:31:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:31:33,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:33,031 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:33,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:33,231 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:33,231 INFO L82 PathProgramCache]: Analyzing trace with hash -400900165, now seen corresponding path program 132 times [2021-03-10 22:31:33,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:33,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473538434] [2021-03-10 22:31:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:31:33,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473538434] [2021-03-10 22:31:33,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105416335] [2021-03-10 22:31:33,284 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 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 22:31:33,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 22:31:33,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:33,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:31:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:31:33,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:33,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:31:33,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351242271] [2021-03-10 22:31:33,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:33,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:33,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:33,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:33,433 INFO L87 Difference]: Start difference. First operand 217428 states and 471139 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 22:31:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:34,878 INFO L93 Difference]: Finished difference Result 237756 states and 514448 transitions. [2021-03-10 22:31:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:31:34,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 86 [2021-03-10 22:31:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:35,247 INFO L225 Difference]: With dead ends: 237756 [2021-03-10 22:31:35,247 INFO L226 Difference]: Without dead ends: 237672 [2021-03-10 22:31:35,248 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237672 states. [2021-03-10 22:31:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237672 to 232076. [2021-03-10 22:31:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232076 states, 232075 states have (on average 2.170931810837014) internal successors, (503819), 232075 states have internal predecessors, (503819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232076 states to 232076 states and 503819 transitions. [2021-03-10 22:31:39,370 INFO L78 Accepts]: Start accepts. Automaton has 232076 states and 503819 transitions. Word has length 86 [2021-03-10 22:31:39,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:39,370 INFO L480 AbstractCegarLoop]: Abstraction has 232076 states and 503819 transitions. [2021-03-10 22:31:39,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 22:31:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand 232076 states and 503819 transitions. [2021-03-10 22:31:39,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-03-10 22:31:39,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:39,532 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:39,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-10 22:31:39,733 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:39,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1535732903, now seen corresponding path program 133 times [2021-03-10 22:31:39,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:39,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124043537] [2021-03-10 22:31:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:39,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124043537] [2021-03-10 22:31:39,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087241514] [2021-03-10 22:31:39,837 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 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 22:31:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:39,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:31:39,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:40,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:40,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-03-10 22:31:40,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71735432] [2021-03-10 22:31:40,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:31:40,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:40,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:31:40,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:31:40,003 INFO L87 Difference]: Start difference. First operand 232076 states and 503819 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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 22:31:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:41,560 INFO L93 Difference]: Finished difference Result 252517 states and 547531 transitions. [2021-03-10 22:31:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:31:41,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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 86 [2021-03-10 22:31:41,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:41,948 INFO L225 Difference]: With dead ends: 252517 [2021-03-10 22:31:41,948 INFO L226 Difference]: Without dead ends: 252517 [2021-03-10 22:31:41,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:31:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252517 states. [2021-03-10 22:31:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252517 to 241564. [2021-03-10 22:31:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241564 states, 241563 states have (on average 2.17548631205938) internal successors, (525517), 241563 states have internal predecessors, (525517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241564 states to 241564 states and 525517 transitions. [2021-03-10 22:31:46,314 INFO L78 Accepts]: Start accepts. Automaton has 241564 states and 525517 transitions. Word has length 86 [2021-03-10 22:31:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:46,315 INFO L480 AbstractCegarLoop]: Abstraction has 241564 states and 525517 transitions. [2021-03-10 22:31:46,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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 22:31:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 241564 states and 525517 transitions. [2021-03-10 22:31:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:31:46,538 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:46,538 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:46,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:46,751 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:46,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:46,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1737688229, now seen corresponding path program 134 times [2021-03-10 22:31:46,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:46,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857962196] [2021-03-10 22:31:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:46,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857962196] [2021-03-10 22:31:46,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195821565] [2021-03-10 22:31:46,887 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 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 22:31:46,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:46,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:46,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:47,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:47,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-03-10 22:31:47,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294126442] [2021-03-10 22:31:47,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:31:47,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:47,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:31:47,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:31:47,034 INFO L87 Difference]: Start difference. First operand 241564 states and 525517 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:48,592 INFO L93 Difference]: Finished difference Result 283927 states and 618212 transitions. [2021-03-10 22:31:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:31:48,593 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:31:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:49,004 INFO L225 Difference]: With dead ends: 283927 [2021-03-10 22:31:49,004 INFO L226 Difference]: Without dead ends: 283661 [2021-03-10 22:31:49,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:31:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283661 states. [2021-03-10 22:31:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283661 to 277706. [2021-03-10 22:31:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277706 states, 277705 states have (on average 2.1876415620892673) internal successors, (607519), 277705 states have internal predecessors, (607519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277706 states to 277706 states and 607519 transitions. [2021-03-10 22:31:53,986 INFO L78 Accepts]: Start accepts. Automaton has 277706 states and 607519 transitions. Word has length 96 [2021-03-10 22:31:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:53,986 INFO L480 AbstractCegarLoop]: Abstraction has 277706 states and 607519 transitions. [2021-03-10 22:31:53,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand 277706 states and 607519 transitions. [2021-03-10 22:31:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:31:54,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:54,240 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:54,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-10 22:31:54,441 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:54,441 INFO L82 PathProgramCache]: Analyzing trace with hash -232879921, now seen corresponding path program 135 times [2021-03-10 22:31:54,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:54,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420086109] [2021-03-10 22:31:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:55,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420086109] [2021-03-10 22:31:55,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31408337] [2021-03-10 22:31:55,161 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 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 22:31:55,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 22:31:55,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:31:55,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:55,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:55,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:31:55,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215739651] [2021-03-10 22:31:55,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:31:55,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:31:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:31:55,373 INFO L87 Difference]: Start difference. First operand 277706 states and 607519 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:56,298 INFO L93 Difference]: Finished difference Result 283289 states and 617046 transitions. [2021-03-10 22:31:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:31:56,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:31:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:56,710 INFO L225 Difference]: With dead ends: 283289 [2021-03-10 22:31:56,711 INFO L226 Difference]: Without dead ends: 283289 [2021-03-10 22:31:56,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 773.3ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283289 states. [2021-03-10 22:32:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283289 to 273694. [2021-03-10 22:32:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273694 states, 273693 states have (on average 2.184911561494083) internal successors, (597995), 273693 states have internal predecessors, (597995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273694 states to 273694 states and 597995 transitions. [2021-03-10 22:32:01,610 INFO L78 Accepts]: Start accepts. Automaton has 273694 states and 597995 transitions. Word has length 96 [2021-03-10 22:32:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:01,610 INFO L480 AbstractCegarLoop]: Abstraction has 273694 states and 597995 transitions. [2021-03-10 22:32:01,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 273694 states and 597995 transitions. [2021-03-10 22:32:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:32:01,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:01,872 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:02,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 22:32:02,072 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:02,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1493261733, now seen corresponding path program 136 times [2021-03-10 22:32:02,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:02,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354153888] [2021-03-10 22:32:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:02,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354153888] [2021-03-10 22:32:02,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341425088] [2021-03-10 22:32:02,778 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 22:32:02,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:02,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:02,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:02,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:02,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:32:02,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081497580] [2021-03-10 22:32:02,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:02,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:02,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:02,978 INFO L87 Difference]: Start difference. First operand 273694 states and 597995 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:03,922 INFO L93 Difference]: Finished difference Result 283158 states and 616236 transitions. [2021-03-10 22:32:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:03,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:32:03,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:04,326 INFO L225 Difference]: With dead ends: 283158 [2021-03-10 22:32:04,326 INFO L226 Difference]: Without dead ends: 283152 [2021-03-10 22:32:04,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 748.6ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283152 states. [2021-03-10 22:32:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283152 to 277546. [2021-03-10 22:32:08,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277546 states, 277545 states have (on average 2.1873894323443044) internal successors, (607099), 277545 states have internal predecessors, (607099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277546 states to 277546 states and 607099 transitions. [2021-03-10 22:32:09,449 INFO L78 Accepts]: Start accepts. Automaton has 277546 states and 607099 transitions. Word has length 96 [2021-03-10 22:32:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:09,449 INFO L480 AbstractCegarLoop]: Abstraction has 277546 states and 607099 transitions. [2021-03-10 22:32:09,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 277546 states and 607099 transitions. [2021-03-10 22:32:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:32:10,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:10,343 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:10,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:10,558 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1188536113, now seen corresponding path program 137 times [2021-03-10 22:32:10,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:10,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113960160] [2021-03-10 22:32:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:10,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113960160] [2021-03-10 22:32:10,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440379642] [2021-03-10 22:32:10,617 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 22:32:10,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 22:32:10,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:10,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:10,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:10,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:32:10,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886794665] [2021-03-10 22:32:10,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:10,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:10,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:10,780 INFO L87 Difference]: Start difference. First operand 277546 states and 607099 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:11,678 INFO L93 Difference]: Finished difference Result 287744 states and 625793 transitions. [2021-03-10 22:32:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:11,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:32:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:12,072 INFO L225 Difference]: With dead ends: 287744 [2021-03-10 22:32:12,072 INFO L226 Difference]: Without dead ends: 287744 [2021-03-10 22:32:12,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287744 states. [2021-03-10 22:32:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287744 to 277562. [2021-03-10 22:32:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277562 states, 277561 states have (on average 2.1872056953246313) internal successors, (607083), 277561 states have internal predecessors, (607083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277562 states to 277562 states and 607083 transitions. [2021-03-10 22:32:17,383 INFO L78 Accepts]: Start accepts. Automaton has 277562 states and 607083 transitions. Word has length 96 [2021-03-10 22:32:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:17,383 INFO L480 AbstractCegarLoop]: Abstraction has 277562 states and 607083 transitions. [2021-03-10 22:32:17,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 277562 states and 607083 transitions. [2021-03-10 22:32:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:32:17,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:17,574 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:17,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-03-10 22:32:17,779 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:17,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:17,779 INFO L82 PathProgramCache]: Analyzing trace with hash -798332187, now seen corresponding path program 138 times [2021-03-10 22:32:17,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:17,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226688128] [2021-03-10 22:32:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:17,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226688128] [2021-03-10 22:32:17,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360498170] [2021-03-10 22:32:17,838 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 22:32:17,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 22:32:17,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:17,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:17,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:17,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:17,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 22:32:17,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873059138] [2021-03-10 22:32:17,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:17,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:17,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:17,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:17,984 INFO L87 Difference]: Start difference. First operand 277562 states and 607083 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:19,484 INFO L93 Difference]: Finished difference Result 287474 states and 626678 transitions. [2021-03-10 22:32:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:32:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:19,867 INFO L225 Difference]: With dead ends: 287474 [2021-03-10 22:32:19,868 INFO L226 Difference]: Without dead ends: 287474 [2021-03-10 22:32:19,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:20,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287474 states. [2021-03-10 22:32:23,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287474 to 273034. [2021-03-10 22:32:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273034 states, 273033 states have (on average 2.184860438115539) internal successors, (596539), 273033 states have internal predecessors, (596539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273034 states to 273034 states and 596539 transitions. [2021-03-10 22:32:24,462 INFO L78 Accepts]: Start accepts. Automaton has 273034 states and 596539 transitions. Word has length 96 [2021-03-10 22:32:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:24,463 INFO L480 AbstractCegarLoop]: Abstraction has 273034 states and 596539 transitions. [2021-03-10 22:32:24,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 273034 states and 596539 transitions. [2021-03-10 22:32:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:32:24,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:24,669 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:24,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:24,869 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:24,869 INFO L82 PathProgramCache]: Analyzing trace with hash 529753287, now seen corresponding path program 139 times [2021-03-10 22:32:24,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:24,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131903838] [2021-03-10 22:32:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:32:24,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131903838] [2021-03-10 22:32:24,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542168908] [2021-03-10 22:32:24,921 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 22:32:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:32:25,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:25,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:32:25,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672214987] [2021-03-10 22:32:25,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:25,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:25,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:25,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:25,063 INFO L87 Difference]: Start difference. First operand 273034 states and 596539 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:26,626 INFO L93 Difference]: Finished difference Result 292897 states and 638403 transitions. [2021-03-10 22:32:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:32:26,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:32:26,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:26,976 INFO L225 Difference]: With dead ends: 292897 [2021-03-10 22:32:26,976 INFO L226 Difference]: Without dead ends: 292861 [2021-03-10 22:32:26,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292861 states. [2021-03-10 22:32:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292861 to 277790. [2021-03-10 22:32:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277790 states, 277789 states have (on average 2.1869656465878777) internal successors, (607515), 277789 states have internal predecessors, (607515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277790 states to 277790 states and 607515 transitions. [2021-03-10 22:32:31,932 INFO L78 Accepts]: Start accepts. Automaton has 277790 states and 607515 transitions. Word has length 96 [2021-03-10 22:32:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:31,932 INFO L480 AbstractCegarLoop]: Abstraction has 277790 states and 607515 transitions. [2021-03-10 22:32:31,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 277790 states and 607515 transitions. [2021-03-10 22:32:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:32:32,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:32,204 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:32,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:32,419 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:32,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2053890469, now seen corresponding path program 140 times [2021-03-10 22:32:32,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:32,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276210697] [2021-03-10 22:32:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:32,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276210697] [2021-03-10 22:32:32,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301007390] [2021-03-10 22:32:32,469 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 22:32:32,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:32,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:32,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:32,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:32,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:32,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:32:32,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259608792] [2021-03-10 22:32:32,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:32,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:32,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:32,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:32,626 INFO L87 Difference]: Start difference. First operand 277790 states and 607515 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:33,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:33,604 INFO L93 Difference]: Finished difference Result 289842 states and 631433 transitions. [2021-03-10 22:32:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:33,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:32:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:34,599 INFO L225 Difference]: With dead ends: 289842 [2021-03-10 22:32:34,599 INFO L226 Difference]: Without dead ends: 289806 [2021-03-10 22:32:34,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:34,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289806 states. [2021-03-10 22:32:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289806 to 279306. [2021-03-10 22:32:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279306 states, 279305 states have (on average 2.1874259322246288) internal successors, (610959), 279305 states have internal predecessors, (610959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279306 states to 279306 states and 610959 transitions. [2021-03-10 22:32:39,049 INFO L78 Accepts]: Start accepts. Automaton has 279306 states and 610959 transitions. Word has length 96 [2021-03-10 22:32:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:39,049 INFO L480 AbstractCegarLoop]: Abstraction has 279306 states and 610959 transitions. [2021-03-10 22:32:39,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:39,049 INFO L276 IsEmpty]: Start isEmpty. Operand 279306 states and 610959 transitions. [2021-03-10 22:32:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:32:39,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:39,248 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:39,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:39,449 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1749164849, now seen corresponding path program 141 times [2021-03-10 22:32:39,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:39,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314406348] [2021-03-10 22:32:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:39,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314406348] [2021-03-10 22:32:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75468685] [2021-03-10 22:32:39,509 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 22:32:39,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 22:32:39,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:39,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:39,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:39,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:39,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:32:39,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996690928] [2021-03-10 22:32:39,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:32:39,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:32:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:32:39,656 INFO L87 Difference]: Start difference. First operand 279306 states and 610959 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:41,192 INFO L93 Difference]: Finished difference Result 293716 states and 638382 transitions. [2021-03-10 22:32:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:32:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:41,529 INFO L225 Difference]: With dead ends: 293716 [2021-03-10 22:32:41,529 INFO L226 Difference]: Without dead ends: 293716 [2021-03-10 22:32:41,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:32:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293716 states. [2021-03-10 22:32:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293716 to 279290. [2021-03-10 22:32:45,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279290 states, 279289 states have (on average 2.1870356512429776) internal successors, (610815), 279289 states have internal predecessors, (610815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279290 states to 279290 states and 610815 transitions. [2021-03-10 22:32:46,356 INFO L78 Accepts]: Start accepts. Automaton has 279290 states and 610815 transitions. Word has length 96 [2021-03-10 22:32:46,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:46,356 INFO L480 AbstractCegarLoop]: Abstraction has 279290 states and 610815 transitions. [2021-03-10 22:32:46,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand 279290 states and 610815 transitions. [2021-03-10 22:32:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:32:46,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:46,597 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:46,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:46,797 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:46,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1358960923, now seen corresponding path program 142 times [2021-03-10 22:32:46,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:46,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560551023] [2021-03-10 22:32:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:46,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560551023] [2021-03-10 22:32:46,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862196329] [2021-03-10 22:32:46,854 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 22:32:46,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:46,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:46,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:46,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:32:47,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:47,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 22:32:47,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841120063] [2021-03-10 22:32:47,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:32:47,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:47,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:32:47,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:32:47,003 INFO L87 Difference]: Start difference. First operand 279290 states and 610815 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:48,549 INFO L93 Difference]: Finished difference Result 305876 states and 664178 transitions. [2021-03-10 22:32:48,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:32:48,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:32:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:48,970 INFO L225 Difference]: With dead ends: 305876 [2021-03-10 22:32:48,970 INFO L226 Difference]: Without dead ends: 305876 [2021-03-10 22:32:48,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:32:49,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305876 states. [2021-03-10 22:32:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305876 to 279450. [2021-03-10 22:32:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279450 states, 279449 states have (on average 2.186928562993605) internal successors, (611135), 279449 states have internal predecessors, (611135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279450 states to 279450 states and 611135 transitions. [2021-03-10 22:32:53,848 INFO L78 Accepts]: Start accepts. Automaton has 279450 states and 611135 transitions. Word has length 96 [2021-03-10 22:32:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:53,848 INFO L480 AbstractCegarLoop]: Abstraction has 279450 states and 611135 transitions. [2021-03-10 22:32:53,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:53,848 INFO L276 IsEmpty]: Start isEmpty. Operand 279450 states and 611135 transitions. [2021-03-10 22:32:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:32:54,083 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:54,083 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:54,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-03-10 22:32:54,283 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:54,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:54,283 INFO L82 PathProgramCache]: Analyzing trace with hash 93904007, now seen corresponding path program 143 times [2021-03-10 22:32:54,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:54,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819998193] [2021-03-10 22:32:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:54,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819998193] [2021-03-10 22:32:54,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745415344] [2021-03-10 22:32:54,346 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 22:32:54,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-03-10 22:32:54,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:32:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:54,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:54,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 22:32:54,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530134572] [2021-03-10 22:32:54,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:32:54,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:54,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:32:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:32:54,494 INFO L87 Difference]: Start difference. First operand 279450 states and 611135 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:56,021 INFO L93 Difference]: Finished difference Result 291374 states and 635903 transitions. [2021-03-10 22:32:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:32:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:56,454 INFO L225 Difference]: With dead ends: 291374 [2021-03-10 22:32:56,454 INFO L226 Difference]: Without dead ends: 291374 [2021-03-10 22:32:56,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:32:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291374 states. [2021-03-10 22:33:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291374 to 275266. [2021-03-10 22:33:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275266 states, 275265 states have (on average 2.185221513813961) internal successors, (601515), 275265 states have internal predecessors, (601515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275266 states to 275266 states and 601515 transitions. [2021-03-10 22:33:01,360 INFO L78 Accepts]: Start accepts. Automaton has 275266 states and 601515 transitions. Word has length 96 [2021-03-10 22:33:01,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:01,360 INFO L480 AbstractCegarLoop]: Abstraction has 275266 states and 601515 transitions. [2021-03-10 22:33:01,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 275266 states and 601515 transitions. [2021-03-10 22:33:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:33:02,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:02,206 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:02,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-03-10 22:33:02,407 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:02,407 INFO L82 PathProgramCache]: Analyzing trace with hash 211982491, now seen corresponding path program 144 times [2021-03-10 22:33:02,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:02,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319230055] [2021-03-10 22:33:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:33:02,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319230055] [2021-03-10 22:33:02,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952998101] [2021-03-10 22:33:02,459 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 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 22:33:02,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 22:33:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:02,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:33:02,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:33:02,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:02,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:33:02,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169591612] [2021-03-10 22:33:02,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:33:02,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:02,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:33:02,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:33:02,603 INFO L87 Difference]: Start difference. First operand 275266 states and 601515 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 22:33:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:03,457 INFO L93 Difference]: Finished difference Result 284381 states and 619091 transitions. [2021-03-10 22:33:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:33:03,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 96 [2021-03-10 22:33:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:03,870 INFO L225 Difference]: With dead ends: 284381 [2021-03-10 22:33:03,870 INFO L226 Difference]: Without dead ends: 284315 [2021-03-10 22:33:03,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:33:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284315 states. [2021-03-10 22:33:07,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284315 to 279242. [2021-03-10 22:33:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279242 states, 279241 states have (on average 2.1870821261920708) internal successors, (610723), 279241 states have internal predecessors, (610723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:08,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279242 states to 279242 states and 610723 transitions. [2021-03-10 22:33:08,549 INFO L78 Accepts]: Start accepts. Automaton has 279242 states and 610723 transitions. Word has length 96 [2021-03-10 22:33:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:08,549 INFO L480 AbstractCegarLoop]: Abstraction has 279242 states and 610723 transitions. [2021-03-10 22:33:08,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 22:33:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 279242 states and 610723 transitions. [2021-03-10 22:33:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:33:09,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:09,392 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:09,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 22:33:09,593 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash 194774565, now seen corresponding path program 145 times [2021-03-10 22:33:09,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:09,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875733583] [2021-03-10 22:33:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:33:09,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875733583] [2021-03-10 22:33:09,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543475724] [2021-03-10 22:33:09,644 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 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 22:33:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:09,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:33:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:33:09,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:09,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:33:09,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768484835] [2021-03-10 22:33:09,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:33:09,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:09,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:33:09,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:33:09,787 INFO L87 Difference]: Start difference. First operand 279242 states and 610723 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:11,070 INFO L93 Difference]: Finished difference Result 298839 states and 651898 transitions. [2021-03-10 22:33:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:33:11,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:33:11,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:11,582 INFO L225 Difference]: With dead ends: 298839 [2021-03-10 22:33:11,582 INFO L226 Difference]: Without dead ends: 298803 [2021-03-10 22:33:11,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:33:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298803 states. [2021-03-10 22:33:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298803 to 280042. [2021-03-10 22:33:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280042 states, 280041 states have (on average 2.1865476840891156) internal successors, (612323), 280041 states have internal predecessors, (612323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280042 states to 280042 states and 612323 transitions. [2021-03-10 22:33:16,344 INFO L78 Accepts]: Start accepts. Automaton has 280042 states and 612323 transitions. Word has length 96 [2021-03-10 22:33:16,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:16,344 INFO L480 AbstractCegarLoop]: Abstraction has 280042 states and 612323 transitions. [2021-03-10 22:33:16,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:16,344 INFO L276 IsEmpty]: Start isEmpty. Operand 280042 states and 612323 transitions. [2021-03-10 22:33:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:33:16,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:16,586 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:16,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 22:33:16,787 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash -794721701, now seen corresponding path program 146 times [2021-03-10 22:33:16,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:16,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343331685] [2021-03-10 22:33:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:33:16,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343331685] [2021-03-10 22:33:16,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729831358] [2021-03-10 22:33:16,838 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 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 22:33:16,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:16,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:16,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:33:16,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:33:16,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:16,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:33:16,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515290178] [2021-03-10 22:33:16,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:33:16,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:16,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:33:16,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:33:16,980 INFO L87 Difference]: Start difference. First operand 280042 states and 612323 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:18,458 INFO L93 Difference]: Finished difference Result 294586 states and 641708 transitions. [2021-03-10 22:33:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:33:18,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:33:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:18,888 INFO L225 Difference]: With dead ends: 294586 [2021-03-10 22:33:18,889 INFO L226 Difference]: Without dead ends: 294544 [2021-03-10 22:33:18,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:33:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294544 states. [2021-03-10 22:33:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294544 to 284094. [2021-03-10 22:33:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284094 states, 284093 states have (on average 2.187280221617569) internal successors, (621391), 284093 states have internal predecessors, (621391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284094 states to 284094 states and 621391 transitions. [2021-03-10 22:33:23,872 INFO L78 Accepts]: Start accepts. Automaton has 284094 states and 621391 transitions. Word has length 96 [2021-03-10 22:33:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:23,872 INFO L480 AbstractCegarLoop]: Abstraction has 284094 states and 621391 transitions. [2021-03-10 22:33:23,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 284094 states and 621391 transitions. [2021-03-10 22:33:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:33:24,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:24,120 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:24,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 22:33:24,321 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash -489996081, now seen corresponding path program 147 times [2021-03-10 22:33:24,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:24,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201827434] [2021-03-10 22:33:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:33:24,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201827434] [2021-03-10 22:33:24,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820938757] [2021-03-10 22:33:24,368 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 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 22:33:25,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 22:33:25,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:33:25,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:33:25,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:25,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:33:25,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328963348] [2021-03-10 22:33:25,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:33:25,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:33:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:33:25,188 INFO L87 Difference]: Start difference. First operand 284094 states and 621391 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:26,136 INFO L93 Difference]: Finished difference Result 301944 states and 656167 transitions. [2021-03-10 22:33:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:33:26,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:33:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:26,570 INFO L225 Difference]: With dead ends: 301944 [2021-03-10 22:33:26,571 INFO L226 Difference]: Without dead ends: 301944 [2021-03-10 22:33:26,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:33:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301944 states. [2021-03-10 22:33:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301944 to 284134. [2021-03-10 22:33:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284134 states, 284133 states have (on average 2.186831519042139) internal successors, (621351), 284133 states have internal predecessors, (621351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284134 states to 284134 states and 621351 transitions. [2021-03-10 22:33:31,383 INFO L78 Accepts]: Start accepts. Automaton has 284134 states and 621351 transitions. Word has length 96 [2021-03-10 22:33:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:31,383 INFO L480 AbstractCegarLoop]: Abstraction has 284134 states and 621351 transitions. [2021-03-10 22:33:31,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 284134 states and 621351 transitions. [2021-03-10 22:33:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:33:32,245 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:32,245 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:32,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-03-10 22:33:32,446 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:32,446 INFO L82 PathProgramCache]: Analyzing trace with hash -99792155, now seen corresponding path program 148 times [2021-03-10 22:33:32,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:32,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731544877] [2021-03-10 22:33:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:33:32,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731544877] [2021-03-10 22:33:32,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462357437] [2021-03-10 22:33:32,501 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 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 22:33:32,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:32,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:32,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:33:32,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:33:32,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:32,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 22:33:32,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750378720] [2021-03-10 22:33:32,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:33:32,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:33:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:33:32,649 INFO L87 Difference]: Start difference. First operand 284134 states and 621351 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:33,630 INFO L93 Difference]: Finished difference Result 329236 states and 714209 transitions. [2021-03-10 22:33:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:33:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:33:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:34,714 INFO L225 Difference]: With dead ends: 329236 [2021-03-10 22:33:34,715 INFO L226 Difference]: Without dead ends: 329236 [2021-03-10 22:33:34,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:33:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329236 states. [2021-03-10 22:33:38,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329236 to 284210. [2021-03-10 22:33:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284210 states, 284209 states have (on average 2.1864367419750956) internal successors, (621405), 284209 states have internal predecessors, (621405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284210 states to 284210 states and 621405 transitions. [2021-03-10 22:33:39,545 INFO L78 Accepts]: Start accepts. Automaton has 284210 states and 621405 transitions. Word has length 96 [2021-03-10 22:33:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:39,545 INFO L480 AbstractCegarLoop]: Abstraction has 284210 states and 621405 transitions. [2021-03-10 22:33:39,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 284210 states and 621405 transitions. [2021-03-10 22:33:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:33:39,760 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:39,760 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:39,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:39,961 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:39,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:39,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1353072775, now seen corresponding path program 149 times [2021-03-10 22:33:39,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:39,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403249153] [2021-03-10 22:33:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:33:40,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403249153] [2021-03-10 22:33:40,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120875936] [2021-03-10 22:33:40,065 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 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 22:33:40,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 22:33:40,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:40,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:33:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:33:40,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:40,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 22:33:40,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256175951] [2021-03-10 22:33:40,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:33:40,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:40,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:33:40,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:33:40,230 INFO L87 Difference]: Start difference. First operand 284210 states and 621405 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:41,843 INFO L93 Difference]: Finished difference Result 319340 states and 693417 transitions. [2021-03-10 22:33:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:33:41,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:33:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:42,360 INFO L225 Difference]: With dead ends: 319340 [2021-03-10 22:33:42,360 INFO L226 Difference]: Without dead ends: 319340 [2021-03-10 22:33:42,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:33:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319340 states. [2021-03-10 22:33:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319340 to 284530. [2021-03-10 22:33:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284530 states, 284529 states have (on average 2.186227062970734) internal successors, (622045), 284529 states have internal predecessors, (622045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284530 states to 284530 states and 622045 transitions. [2021-03-10 22:33:47,284 INFO L78 Accepts]: Start accepts. Automaton has 284530 states and 622045 transitions. Word has length 96 [2021-03-10 22:33:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:47,284 INFO L480 AbstractCegarLoop]: Abstraction has 284530 states and 622045 transitions. [2021-03-10 22:33:47,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 284530 states and 622045 transitions. [2021-03-10 22:33:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:33:47,534 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:47,534 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:47,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:47,734 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash -508398491, now seen corresponding path program 150 times [2021-03-10 22:33:47,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:47,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741480700] [2021-03-10 22:33:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:47,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741480700] [2021-03-10 22:33:47,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997348533] [2021-03-10 22:33:47,807 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 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 22:33:47,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-03-10 22:33:47,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:33:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:47,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:47,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 22:33:47,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714993698] [2021-03-10 22:33:47,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:33:47,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:47,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:33:47,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:33:47,958 INFO L87 Difference]: Start difference. First operand 284530 states and 622045 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:49,534 INFO L93 Difference]: Finished difference Result 297354 states and 649674 transitions. [2021-03-10 22:33:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:33:49,535 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:33:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:49,954 INFO L225 Difference]: With dead ends: 297354 [2021-03-10 22:33:49,955 INFO L226 Difference]: Without dead ends: 297354 [2021-03-10 22:33:49,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:33:50,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297354 states. [2021-03-10 22:33:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297354 to 282646. [2021-03-10 22:33:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.186350368837234) internal successors, (617961), 282645 states have internal predecessors, (617961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617961 transitions. [2021-03-10 22:33:54,803 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617961 transitions. Word has length 96 [2021-03-10 22:33:54,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:54,803 INFO L480 AbstractCegarLoop]: Abstraction has 282646 states and 617961 transitions. [2021-03-10 22:33:54,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:54,803 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617961 transitions. [2021-03-10 22:33:55,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:33:55,052 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:55,052 INFO L519 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:55,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:55,253 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:55,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:55,253 INFO L82 PathProgramCache]: Analyzing trace with hash 343907052, now seen corresponding path program 151 times [2021-03-10 22:33:55,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:55,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666544663] [2021-03-10 22:33:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 141 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:55,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666544663] [2021-03-10 22:33:55,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297059019] [2021-03-10 22:33:55,329 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 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 22:33:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:55,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:33:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 201 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-03-10 22:33:55,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:55,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 14 [2021-03-10 22:33:55,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375697] [2021-03-10 22:33:55,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:33:55,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:55,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:33:55,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:33:55,461 INFO L87 Difference]: Start difference. First operand 282646 states and 617961 transitions. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 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 22:33:57,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:57,264 INFO L93 Difference]: Finished difference Result 296638 states and 645293 transitions. [2021-03-10 22:33:57,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:33:57,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 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 96 [2021-03-10 22:33:57,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:57,749 INFO L225 Difference]: With dead ends: 296638 [2021-03-10 22:33:57,750 INFO L226 Difference]: Without dead ends: 296566 [2021-03-10 22:33:57,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:33:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296566 states. [2021-03-10 22:34:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296566 to 282646. [2021-03-10 22:34:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.1860107201613332) internal successors, (617865), 282645 states have internal predecessors, (617865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617865 transitions. [2021-03-10 22:34:02,558 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617865 transitions. Word has length 96 [2021-03-10 22:34:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:02,558 INFO L480 AbstractCegarLoop]: Abstraction has 282646 states and 617865 transitions. [2021-03-10 22:34:02,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 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 22:34:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617865 transitions. [2021-03-10 22:34:02,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:34:02,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:02,804 INFO L519 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:03,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:03,004 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:03,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:03,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1564912452, now seen corresponding path program 152 times [2021-03-10 22:34:03,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:03,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991600530] [2021-03-10 22:34:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-03-10 22:34:03,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991600530] [2021-03-10 22:34:03,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795725578] [2021-03-10 22:34:03,052 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 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 22:34:03,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:34:03,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:34:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-03-10 22:34:03,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:03,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-03-10 22:34:03,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232497747] [2021-03-10 22:34:03,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:34:03,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:03,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:34:03,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:34:03,203 INFO L87 Difference]: Start difference. First operand 282646 states and 617865 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 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 22:34:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:04,672 INFO L93 Difference]: Finished difference Result 298171 states and 649070 transitions. [2021-03-10 22:34:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:34:04,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 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 96 [2021-03-10 22:34:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:05,063 INFO L225 Difference]: With dead ends: 298171 [2021-03-10 22:34:05,063 INFO L226 Difference]: Without dead ends: 298171 [2021-03-10 22:34:05,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:34:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298171 states. [2021-03-10 22:34:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298171 to 282022. [2021-03-10 22:34:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282022 states, 282021 states have (on average 2.1855925622560024) internal successors, (616383), 282021 states have internal predecessors, (616383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282022 states to 282022 states and 616383 transitions. [2021-03-10 22:34:09,806 INFO L78 Accepts]: Start accepts. Automaton has 282022 states and 616383 transitions. Word has length 96 [2021-03-10 22:34:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:09,806 INFO L480 AbstractCegarLoop]: Abstraction has 282022 states and 616383 transitions. [2021-03-10 22:34:09,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 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 22:34:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 282022 states and 616383 transitions. [2021-03-10 22:34:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:34:10,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:10,057 INFO L519 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:10,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:10,259 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:10,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:10,259 INFO L82 PathProgramCache]: Analyzing trace with hash -64413626, now seen corresponding path program 153 times [2021-03-10 22:34:10,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:10,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150178944] [2021-03-10 22:34:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 124 proven. 183 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-03-10 22:34:10,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150178944] [2021-03-10 22:34:10,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611114914] [2021-03-10 22:34:10,302 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 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 22:34:10,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 22:34:10,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:10,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 22:34:10,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-03-10 22:34:10,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:10,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 22 [2021-03-10 22:34:10,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041560315] [2021-03-10 22:34:10,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:10,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:10,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:10,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:10,558 INFO L87 Difference]: Start difference. First operand 282022 states and 616383 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:14,449 INFO L93 Difference]: Finished difference Result 527818 states and 1143066 transitions. [2021-03-10 22:34:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-03-10 22:34:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:34:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:15,168 INFO L225 Difference]: With dead ends: 527818 [2021-03-10 22:34:15,169 INFO L226 Difference]: Without dead ends: 527644 [2021-03-10 22:34:15,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 1685.1ms TimeCoverageRelationStatistics Valid=1106, Invalid=12004, Unknown=0, NotChecked=0, Total=13110 [2021-03-10 22:34:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527644 states. [2021-03-10 22:34:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527644 to 396232. [2021-03-10 22:34:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396232 states, 396231 states have (on average 2.1780552253609637) internal successors, (863013), 396231 states have internal predecessors, (863013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396232 states to 396232 states and 863013 transitions. [2021-03-10 22:34:23,379 INFO L78 Accepts]: Start accepts. Automaton has 396232 states and 863013 transitions. Word has length 96 [2021-03-10 22:34:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:23,379 INFO L480 AbstractCegarLoop]: Abstraction has 396232 states and 863013 transitions. [2021-03-10 22:34:23,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 396232 states and 863013 transitions. [2021-03-10 22:34:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:34:23,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:23,610 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:23,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:23,820 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:23,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1559341669, now seen corresponding path program 154 times [2021-03-10 22:34:23,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:23,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465980053] [2021-03-10 22:34:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:34:23,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465980053] [2021-03-10 22:34:23,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018590179] [2021-03-10 22:34:23,869 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) [2021-03-10 22:34:23,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:34:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:34:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:34:24,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:24,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:34:24,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802628207] [2021-03-10 22:34:24,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:34:24,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:24,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:34:24,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:34:24,032 INFO L87 Difference]: Start difference. First operand 396232 states and 863013 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 22:34:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:25,873 INFO L93 Difference]: Finished difference Result 407321 states and 884626 transitions. [2021-03-10 22:34:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:34:25,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 96 [2021-03-10 22:34:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:26,461 INFO L225 Difference]: With dead ends: 407321 [2021-03-10 22:34:26,462 INFO L226 Difference]: Without dead ends: 407255 [2021-03-10 22:34:26,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:34:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407255 states. [2021-03-10 22:34:31,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407255 to 401628. [2021-03-10 22:34:32,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401628 states, 401627 states have (on average 2.1796965841439944) internal successors, (875425), 401627 states have internal predecessors, (875425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401628 states to 401628 states and 875425 transitions. [2021-03-10 22:34:33,478 INFO L78 Accepts]: Start accepts. Automaton has 401628 states and 875425 transitions. Word has length 96 [2021-03-10 22:34:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:33,478 INFO L480 AbstractCegarLoop]: Abstraction has 401628 states and 875425 transitions. [2021-03-10 22:34:33,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 22:34:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 401628 states and 875425 transitions. [2021-03-10 22:34:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:34:33,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:33,724 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:33,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:33,924 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:33,924 INFO L82 PathProgramCache]: Analyzing trace with hash 408916935, now seen corresponding path program 155 times [2021-03-10 22:34:33,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:33,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331721033] [2021-03-10 22:34:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:34:33,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331721033] [2021-03-10 22:34:33,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908301100] [2021-03-10 22:34:33,982 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 22:34:34,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-03-10 22:34:34,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:34,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:34:34,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:34:34,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:34,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:34:34,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598809268] [2021-03-10 22:34:34,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:34:34,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:34,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:34:34,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:34:34,127 INFO L87 Difference]: Start difference. First operand 401628 states and 875425 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:35,941 INFO L93 Difference]: Finished difference Result 427365 states and 929947 transitions. [2021-03-10 22:34:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:34:35,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:34:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:36,542 INFO L225 Difference]: With dead ends: 427365 [2021-03-10 22:34:36,542 INFO L226 Difference]: Without dead ends: 427293 [2021-03-10 22:34:36,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:34:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427293 states. [2021-03-10 22:34:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427293 to 403688. [2021-03-10 22:34:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403688 states, 403687 states have (on average 2.1797308310646617) internal successors, (879929), 403687 states have internal predecessors, (879929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403688 states to 403688 states and 879929 transitions. [2021-03-10 22:34:44,447 INFO L78 Accepts]: Start accepts. Automaton has 403688 states and 879929 transitions. Word has length 96 [2021-03-10 22:34:44,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:44,447 INFO L480 AbstractCegarLoop]: Abstraction has 403688 states and 879929 transitions. [2021-03-10 22:34:44,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 403688 states and 879929 transitions. [2021-03-10 22:34:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:34:44,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:44,755 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:44,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-03-10 22:34:44,971 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash -7602597, now seen corresponding path program 156 times [2021-03-10 22:34:44,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:44,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167333766] [2021-03-10 22:34:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:34:45,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167333766] [2021-03-10 22:34:45,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611101692] [2021-03-10 22:34:45,022 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 22:34:45,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-03-10 22:34:45,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:34:45,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:34:45,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:45,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:34:45,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126607606] [2021-03-10 22:34:45,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:34:45,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:45,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:34:45,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:34:45,201 INFO L87 Difference]: Start difference. First operand 403688 states and 879929 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:45,997 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-03-10 22:34:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:47,401 INFO L93 Difference]: Finished difference Result 425634 states and 925391 transitions. [2021-03-10 22:34:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:34:47,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:34:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:48,029 INFO L225 Difference]: With dead ends: 425634 [2021-03-10 22:34:48,029 INFO L226 Difference]: Without dead ends: 425592 [2021-03-10 22:34:48,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 677.2ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:34:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425592 states. [2021-03-10 22:34:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425592 to 412428. [2021-03-10 22:34:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412428 states, 412427 states have (on average 2.1807131928801944) internal successors, (899385), 412427 states have internal predecessors, (899385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:55,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412428 states to 412428 states and 899385 transitions. [2021-03-10 22:34:55,771 INFO L78 Accepts]: Start accepts. Automaton has 412428 states and 899385 transitions. Word has length 96 [2021-03-10 22:34:55,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:55,771 INFO L480 AbstractCegarLoop]: Abstraction has 412428 states and 899385 transitions. [2021-03-10 22:34:55,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 412428 states and 899385 transitions. [2021-03-10 22:34:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:34:56,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:56,102 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:56,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-10 22:34:56,315 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:56,315 INFO L82 PathProgramCache]: Analyzing trace with hash 297123023, now seen corresponding path program 157 times [2021-03-10 22:34:56,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:56,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331531548] [2021-03-10 22:34:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:34:56,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331531548] [2021-03-10 22:34:56,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443196579] [2021-03-10 22:34:56,366 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 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 22:34:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:56,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:34:56,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:34:56,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:56,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:34:56,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379492983] [2021-03-10 22:34:56,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:34:56,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:56,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:34:56,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:34:56,530 INFO L87 Difference]: Start difference. First operand 412428 states and 899385 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:58,404 INFO L93 Difference]: Finished difference Result 439240 states and 953108 transitions. [2021-03-10 22:34:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:34:58,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:34:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:59,072 INFO L225 Difference]: With dead ends: 439240 [2021-03-10 22:34:59,073 INFO L226 Difference]: Without dead ends: 439240 [2021-03-10 22:34:59,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:34:59,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439240 states. [2021-03-10 22:35:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439240 to 412684. [2021-03-10 22:35:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412684 states, 412683 states have (on average 2.1804266228557996) internal successors, (899825), 412683 states have internal predecessors, (899825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412684 states to 412684 states and 899825 transitions. [2021-03-10 22:35:06,534 INFO L78 Accepts]: Start accepts. Automaton has 412684 states and 899825 transitions. Word has length 96 [2021-03-10 22:35:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:06,534 INFO L480 AbstractCegarLoop]: Abstraction has 412684 states and 899825 transitions. [2021-03-10 22:35:06,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 412684 states and 899825 transitions. [2021-03-10 22:35:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:35:06,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:06,822 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:07,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-10 22:35:07,022 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:07,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:07,023 INFO L82 PathProgramCache]: Analyzing trace with hash 687326949, now seen corresponding path program 158 times [2021-03-10 22:35:07,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:07,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634355394] [2021-03-10 22:35:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:35:07,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634355394] [2021-03-10 22:35:07,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552382404] [2021-03-10 22:35:07,079 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 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 22:35:07,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:35:07,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:07,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:35:07,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:35:07,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:07,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 22:35:07,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13978788] [2021-03-10 22:35:07,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:35:07,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:07,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:35:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:35:07,231 INFO L87 Difference]: Start difference. First operand 412684 states and 899825 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:09,385 INFO L93 Difference]: Finished difference Result 495432 states and 1073586 transitions. [2021-03-10 22:35:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:35:09,386 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:35:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:10,641 INFO L225 Difference]: With dead ends: 495432 [2021-03-10 22:35:10,641 INFO L226 Difference]: Without dead ends: 495432 [2021-03-10 22:35:10,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=250, Invalid=400, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:35:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495432 states. [2021-03-10 22:35:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495432 to 413220. [2021-03-10 22:35:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413220 states, 413219 states have (on average 2.1798634622318915) internal successors, (900761), 413219 states have internal predecessors, (900761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413220 states to 413220 states and 900761 transitions. [2021-03-10 22:35:18,081 INFO L78 Accepts]: Start accepts. Automaton has 413220 states and 900761 transitions. Word has length 96 [2021-03-10 22:35:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:18,082 INFO L480 AbstractCegarLoop]: Abstraction has 413220 states and 900761 transitions. [2021-03-10 22:35:18,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 413220 states and 900761 transitions. [2021-03-10 22:35:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:35:18,387 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:18,387 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:18,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:18,588 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2140191879, now seen corresponding path program 159 times [2021-03-10 22:35:18,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:18,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857820973] [2021-03-10 22:35:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:35:18,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857820973] [2021-03-10 22:35:18,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226100236] [2021-03-10 22:35:18,650 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 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 22:35:18,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-03-10 22:35:18,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:18,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:35:18,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:35:18,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:18,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 22:35:18,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358634165] [2021-03-10 22:35:18,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:35:18,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:18,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:35:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:35:18,812 INFO L87 Difference]: Start difference. First operand 413220 states and 900761 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:21,257 INFO L93 Difference]: Finished difference Result 497004 states and 1077768 transitions. [2021-03-10 22:35:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:35:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:35:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:22,173 INFO L225 Difference]: With dead ends: 497004 [2021-03-10 22:35:22,173 INFO L226 Difference]: Without dead ends: 497004 [2021-03-10 22:35:22,174 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=307, Invalid=505, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:35:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497004 states. [2021-03-10 22:35:28,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497004 to 413420. [2021-03-10 22:35:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413420 states, 413419 states have (on average 2.179457160894879) internal successors, (901029), 413419 states have internal predecessors, (901029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413420 states to 413420 states and 901029 transitions. [2021-03-10 22:35:30,278 INFO L78 Accepts]: Start accepts. Automaton has 413420 states and 901029 transitions. Word has length 96 [2021-03-10 22:35:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:30,278 INFO L480 AbstractCegarLoop]: Abstraction has 413420 states and 901029 transitions. [2021-03-10 22:35:30,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 413420 states and 901029 transitions. [2021-03-10 22:35:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:35:30,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:30,595 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:30,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-03-10 22:35:30,807 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:30,808 INFO L82 PathProgramCache]: Analyzing trace with hash 278720613, now seen corresponding path program 160 times [2021-03-10 22:35:30,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:30,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017825875] [2021-03-10 22:35:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:35:30,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017825875] [2021-03-10 22:35:30,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808633630] [2021-03-10 22:35:30,895 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 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 22:35:30,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:35:30,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:35:30,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:35:31,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:31,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 22:35:31,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708430486] [2021-03-10 22:35:31,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:35:31,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:31,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:35:31,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:35:31,046 INFO L87 Difference]: Start difference. First operand 413420 states and 901029 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:33,096 INFO L93 Difference]: Finished difference Result 465380 states and 1009820 transitions. [2021-03-10 22:35:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:35:33,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:35:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:33,767 INFO L225 Difference]: With dead ends: 465380 [2021-03-10 22:35:33,768 INFO L226 Difference]: Without dead ends: 465380 [2021-03-10 22:35:33,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=321, Invalid=549, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:35:34,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465380 states. [2021-03-10 22:35:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465380 to 414060. [2021-03-10 22:35:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414060 states, 414059 states have (on average 2.1791797787271863) internal successors, (902309), 414059 states have internal predecessors, (902309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414060 states to 414060 states and 902309 transitions. [2021-03-10 22:35:41,597 INFO L78 Accepts]: Start accepts. Automaton has 414060 states and 902309 transitions. Word has length 96 [2021-03-10 22:35:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:41,597 INFO L480 AbstractCegarLoop]: Abstraction has 414060 states and 902309 transitions. [2021-03-10 22:35:41,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 414060 states and 902309 transitions. [2021-03-10 22:35:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:35:41,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:41,859 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:42,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:42,060 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:42,060 INFO L82 PathProgramCache]: Analyzing trace with hash 553698183, now seen corresponding path program 161 times [2021-03-10 22:35:42,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:42,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812005865] [2021-03-10 22:35:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:42,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812005865] [2021-03-10 22:35:42,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416186333] [2021-03-10 22:35:42,135 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 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 22:35:42,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-03-10 22:35:42,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:42,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:35:42,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:42,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:42,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 22:35:42,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255171146] [2021-03-10 22:35:42,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:35:42,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:42,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:35:42,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:35:42,290 INFO L87 Difference]: Start difference. First operand 414060 states and 902309 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:44,141 INFO L93 Difference]: Finished difference Result 430906 states and 940689 transitions. [2021-03-10 22:35:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:35:44,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:35:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:44,767 INFO L225 Difference]: With dead ends: 430906 [2021-03-10 22:35:44,768 INFO L226 Difference]: Without dead ends: 430906 [2021-03-10 22:35:44,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:35:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430906 states. [2021-03-10 22:35:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430906 to 401228. [2021-03-10 22:35:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401228 states, 401227 states have (on average 2.1776525508004196) internal successors, (873733), 401227 states have internal predecessors, (873733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401228 states to 401228 states and 873733 transitions. [2021-03-10 22:35:51,869 INFO L78 Accepts]: Start accepts. Automaton has 401228 states and 873733 transitions. Word has length 96 [2021-03-10 22:35:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:51,869 INFO L480 AbstractCegarLoop]: Abstraction has 401228 states and 873733 transitions. [2021-03-10 22:35:51,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 401228 states and 873733 transitions. [2021-03-10 22:35:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:35:52,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:52,774 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:52,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:52,989 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash 449615781, now seen corresponding path program 162 times [2021-03-10 22:35:52,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:52,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376282992] [2021-03-10 22:35:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:35:53,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376282992] [2021-03-10 22:35:53,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127012104] [2021-03-10 22:35:53,037 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 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 22:35:53,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-03-10 22:35:53,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:53,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:35:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:35:53,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:53,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:35:53,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203665279] [2021-03-10 22:35:53,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:35:53,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:35:53,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:35:53,183 INFO L87 Difference]: Start difference. First operand 401228 states and 873733 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:55,001 INFO L93 Difference]: Finished difference Result 424850 states and 924011 transitions. [2021-03-10 22:35:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:35:55,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:35:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:55,597 INFO L225 Difference]: With dead ends: 424850 [2021-03-10 22:35:55,597 INFO L226 Difference]: Without dead ends: 424778 [2021-03-10 22:35:55,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:35:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424778 states. [2021-03-10 22:36:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424778 to 401892. [2021-03-10 22:36:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401892 states, 401891 states have (on average 2.1778666354807648) internal successors, (875265), 401891 states have internal predecessors, (875265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401892 states to 401892 states and 875265 transitions. [2021-03-10 22:36:03,204 INFO L78 Accepts]: Start accepts. Automaton has 401892 states and 875265 transitions. Word has length 96 [2021-03-10 22:36:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:03,204 INFO L480 AbstractCegarLoop]: Abstraction has 401892 states and 875265 transitions. [2021-03-10 22:36:03,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 401892 states and 875265 transitions. [2021-03-10 22:36:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:36:03,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:03,427 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:03,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:03,642 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:03,643 INFO L82 PathProgramCache]: Analyzing trace with hash -198417829, now seen corresponding path program 163 times [2021-03-10 22:36:03,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:03,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444313194] [2021-03-10 22:36:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:03,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444313194] [2021-03-10 22:36:03,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207957305] [2021-03-10 22:36:03,689 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 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 22:36:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:03,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:36:03,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:03,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:03,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:36:03,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582691278] [2021-03-10 22:36:03,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:36:03,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:03,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:36:03,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:36:03,839 INFO L87 Difference]: Start difference. First operand 401892 states and 875265 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:05,765 INFO L93 Difference]: Finished difference Result 419176 states and 910606 transitions. [2021-03-10 22:36:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:36:05,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:36:05,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:06,618 INFO L225 Difference]: With dead ends: 419176 [2021-03-10 22:36:06,618 INFO L226 Difference]: Without dead ends: 419134 [2021-03-10 22:36:06,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:36:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419134 states. [2021-03-10 22:36:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419134 to 407336. [2021-03-10 22:36:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407336 states, 407335 states have (on average 2.1785532792419016) internal successors, (887401), 407335 states have internal predecessors, (887401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:13,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407336 states to 407336 states and 887401 transitions. [2021-03-10 22:36:13,905 INFO L78 Accepts]: Start accepts. Automaton has 407336 states and 887401 transitions. Word has length 96 [2021-03-10 22:36:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:13,905 INFO L480 AbstractCegarLoop]: Abstraction has 407336 states and 887401 transitions. [2021-03-10 22:36:13,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 407336 states and 887401 transitions. [2021-03-10 22:36:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:36:14,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:14,098 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:14,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-03-10 22:36:14,298 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash 106307791, now seen corresponding path program 164 times [2021-03-10 22:36:14,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:14,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474766435] [2021-03-10 22:36:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:14,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474766435] [2021-03-10 22:36:14,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784076866] [2021-03-10 22:36:14,348 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 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 22:36:14,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:36:14,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:14,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:36:14,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:14,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:14,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 22:36:14,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050669832] [2021-03-10 22:36:14,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:36:14,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:14,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:36:14,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:36:14,497 INFO L87 Difference]: Start difference. First operand 407336 states and 887401 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:16,275 INFO L93 Difference]: Finished difference Result 432146 states and 937019 transitions. [2021-03-10 22:36:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:36:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:36:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:16,888 INFO L225 Difference]: With dead ends: 432146 [2021-03-10 22:36:16,888 INFO L226 Difference]: Without dead ends: 432146 [2021-03-10 22:36:16,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:36:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432146 states. [2021-03-10 22:36:22,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432146 to 407536. [2021-03-10 22:36:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407536 states, 407535 states have (on average 2.178485283472585) internal successors, (887809), 407535 states have internal predecessors, (887809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407536 states to 407536 states and 887809 transitions. [2021-03-10 22:36:23,905 INFO L78 Accepts]: Start accepts. Automaton has 407536 states and 887809 transitions. Word has length 96 [2021-03-10 22:36:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:23,905 INFO L480 AbstractCegarLoop]: Abstraction has 407536 states and 887809 transitions. [2021-03-10 22:36:23,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 407536 states and 887809 transitions. [2021-03-10 22:36:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:36:24,131 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:24,131 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:24,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:36:24,331 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash 496511717, now seen corresponding path program 165 times [2021-03-10 22:36:24,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:24,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923387611] [2021-03-10 22:36:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:24,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923387611] [2021-03-10 22:36:24,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279249908] [2021-03-10 22:36:24,385 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 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 22:36:24,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-03-10 22:36:24,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:24,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:36:24,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:24,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:24,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 22:36:24,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103854414] [2021-03-10 22:36:24,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:36:24,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:24,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:36:24,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:36:24,533 INFO L87 Difference]: Start difference. First operand 407536 states and 887809 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:26,508 INFO L93 Difference]: Finished difference Result 488982 states and 1058761 transitions. [2021-03-10 22:36:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:36:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:36:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:27,754 INFO L225 Difference]: With dead ends: 488982 [2021-03-10 22:36:27,754 INFO L226 Difference]: Without dead ends: 488982 [2021-03-10 22:36:27,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:36:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488982 states. [2021-03-10 22:36:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488982 to 408416. [2021-03-10 22:36:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408416 states, 408415 states have (on average 2.178090912429759) internal successors, (889565), 408415 states have internal predecessors, (889565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408416 states to 408416 states and 889565 transitions. [2021-03-10 22:36:35,276 INFO L78 Accepts]: Start accepts. Automaton has 408416 states and 889565 transitions. Word has length 96 [2021-03-10 22:36:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:35,276 INFO L480 AbstractCegarLoop]: Abstraction has 408416 states and 889565 transitions. [2021-03-10 22:36:35,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 408416 states and 889565 transitions. [2021-03-10 22:36:35,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:36:35,463 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:35,463 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:35,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 22:36:35,664 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:35,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1949376647, now seen corresponding path program 166 times [2021-03-10 22:36:35,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:35,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859217345] [2021-03-10 22:36:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:35,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859217345] [2021-03-10 22:36:35,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063221156] [2021-03-10 22:36:35,726 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 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 22:36:35,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:36:35,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:35,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:36:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:35,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:35,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 22:36:35,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93923213] [2021-03-10 22:36:35,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:36:35,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:36:35,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:36:35,894 INFO L87 Difference]: Start difference. First operand 408416 states and 889565 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:37,990 INFO L93 Difference]: Finished difference Result 500230 states and 1083955 transitions. [2021-03-10 22:36:37,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:36:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:36:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:38,878 INFO L225 Difference]: With dead ends: 500230 [2021-03-10 22:36:38,878 INFO L226 Difference]: Without dead ends: 500230 [2021-03-10 22:36:38,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=350, Invalid=580, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:36:39,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500230 states. [2021-03-10 22:36:44,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500230 to 409316. [2021-03-10 22:36:45,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409316 states, 409315 states have (on average 2.177748189047555) internal successors, (891385), 409315 states have internal predecessors, (891385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409316 states to 409316 states and 891385 transitions. [2021-03-10 22:36:46,791 INFO L78 Accepts]: Start accepts. Automaton has 409316 states and 891385 transitions. Word has length 96 [2021-03-10 22:36:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:46,791 INFO L480 AbstractCegarLoop]: Abstraction has 409316 states and 891385 transitions. [2021-03-10 22:36:46,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 409316 states and 891385 transitions. [2021-03-10 22:36:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:36:46,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:46,980 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:47,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-10 22:36:47,191 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:47,191 INFO L82 PathProgramCache]: Analyzing trace with hash 87905381, now seen corresponding path program 167 times [2021-03-10 22:36:47,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:47,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968215628] [2021-03-10 22:36:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:47,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968215628] [2021-03-10 22:36:47,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923900988] [2021-03-10 22:36:47,268 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 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 22:36:47,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-03-10 22:36:47,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:36:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:47,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:47,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 22:36:47,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758841482] [2021-03-10 22:36:47,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:36:47,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:47,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:36:47,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:36:47,427 INFO L87 Difference]: Start difference. First operand 409316 states and 891385 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:36:49,388 INFO L93 Difference]: Finished difference Result 484574 states and 1051121 transitions. [2021-03-10 22:36:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:36:49,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:36:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:36:50,154 INFO L225 Difference]: With dead ends: 484574 [2021-03-10 22:36:50,154 INFO L226 Difference]: Without dead ends: 484574 [2021-03-10 22:36:50,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:36:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484574 states. [2021-03-10 22:36:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484574 to 409896. [2021-03-10 22:36:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409896 states, 409895 states have (on average 2.1773405384305735) internal successors, (892481), 409895 states have internal predecessors, (892481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409896 states to 409896 states and 892481 transitions. [2021-03-10 22:36:57,491 INFO L78 Accepts]: Start accepts. Automaton has 409896 states and 892481 transitions. Word has length 96 [2021-03-10 22:36:57,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:36:57,491 INFO L480 AbstractCegarLoop]: Abstraction has 409896 states and 892481 transitions. [2021-03-10 22:36:57,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:36:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 409896 states and 892481 transitions. [2021-03-10 22:36:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:36:58,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:36:58,405 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:36:58,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-03-10 22:36:58,605 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:36:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:36:58,606 INFO L82 PathProgramCache]: Analyzing trace with hash 362882951, now seen corresponding path program 168 times [2021-03-10 22:36:58,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:36:58,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296240657] [2021-03-10 22:36:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:36:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:36:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:58,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296240657] [2021-03-10 22:36:58,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522300402] [2021-03-10 22:36:58,680 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 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 22:36:58,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-03-10 22:36:58,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:36:58,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:36:58,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:36:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:36:58,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:36:58,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 22:36:58,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730124750] [2021-03-10 22:36:58,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:36:58,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:36:58,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:36:58,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:36:58,829 INFO L87 Difference]: Start difference. First operand 409896 states and 892481 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:37:00,699 INFO L93 Difference]: Finished difference Result 452934 states and 982423 transitions. [2021-03-10 22:37:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:37:00,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:37:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:37:01,337 INFO L225 Difference]: With dead ends: 452934 [2021-03-10 22:37:01,338 INFO L226 Difference]: Without dead ends: 452934 [2021-03-10 22:37:01,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=385, Invalid=671, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:37:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452934 states. [2021-03-10 22:37:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452934 to 410776. [2021-03-10 22:37:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410776 states, 410775 states have (on average 2.1769606232122207) internal successors, (894241), 410775 states have internal predecessors, (894241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410776 states to 410776 states and 894241 transitions. [2021-03-10 22:37:08,589 INFO L78 Accepts]: Start accepts. Automaton has 410776 states and 894241 transitions. Word has length 96 [2021-03-10 22:37:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:37:08,589 INFO L480 AbstractCegarLoop]: Abstraction has 410776 states and 894241 transitions. [2021-03-10 22:37:08,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 410776 states and 894241 transitions. [2021-03-10 22:37:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:37:08,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:37:08,841 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:37:09,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-03-10 22:37:09,041 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:37:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:37:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1973198309, now seen corresponding path program 169 times [2021-03-10 22:37:09,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:37:09,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602482953] [2021-03-10 22:37:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:37:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:09,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602482953] [2021-03-10 22:37:09,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548217030] [2021-03-10 22:37:09,126 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 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 22:37:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:09,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:37:09,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:37:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:37:09,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:37:09,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-03-10 22:37:09,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091344851] [2021-03-10 22:37:09,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:37:09,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:37:09,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:37:09,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:37:09,277 INFO L87 Difference]: Start difference. First operand 410776 states and 894241 transitions. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:11,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:37:11,210 INFO L93 Difference]: Finished difference Result 425560 states and 927070 transitions. [2021-03-10 22:37:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:37:11,211 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-03-10 22:37:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:37:11,842 INFO L225 Difference]: With dead ends: 425560 [2021-03-10 22:37:11,842 INFO L226 Difference]: Without dead ends: 425560 [2021-03-10 22:37:11,842 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:37:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425560 states. [2021-03-10 22:37:17,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425560 to 404836. [2021-03-10 22:37:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404836 states, 404835 states have (on average 2.178163943334939) internal successors, (881797), 404835 states have internal predecessors, (881797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404836 states to 404836 states and 881797 transitions. [2021-03-10 22:37:20,038 INFO L78 Accepts]: Start accepts. Automaton has 404836 states and 881797 transitions. Word has length 96 [2021-03-10 22:37:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:37:20,039 INFO L480 AbstractCegarLoop]: Abstraction has 404836 states and 881797 transitions. [2021-03-10 22:37:20,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 404836 states and 881797 transitions. [2021-03-10 22:37:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:37:20,315 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:37:20,315 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:37:20,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:20,531 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:37:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:37:20,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2072034489, now seen corresponding path program 170 times [2021-03-10 22:37:20,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:37:20,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147024717] [2021-03-10 22:37:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:37:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:37:20,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147024717] [2021-03-10 22:37:20,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282653609] [2021-03-10 22:37:20,615 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 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 22:37:20,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:37:20,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:37:20,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:37:20,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:37:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-03-10 22:37:20,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:37:20,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 22:37:20,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092798881] [2021-03-10 22:37:20,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:37:20,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:37:20,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:37:20,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:37:20,768 INFO L87 Difference]: Start difference. First operand 404836 states and 881797 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 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 22:37:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:37:23,067 INFO L93 Difference]: Finished difference Result 422860 states and 919321 transitions. [2021-03-10 22:37:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:37:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 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 96 [2021-03-10 22:37:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:37:23,710 INFO L225 Difference]: With dead ends: 422860 [2021-03-10 22:37:23,710 INFO L226 Difference]: Without dead ends: 422704 [2021-03-10 22:37:23,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:37:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422704 states. [2021-03-10 22:37:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422704 to 408288. [2021-03-10 22:37:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408288 states, 408287 states have (on average 2.179890616159711) internal successors, (890021), 408287 states have internal predecessors, (890021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:37:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408288 states to 408288 states and 890021 transitions. [2021-03-10 22:37:31,087 INFO L78 Accepts]: Start accepts. Automaton has 408288 states and 890021 transitions. Word has length 96 [2021-03-10 22:37:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:37:31,087 INFO L480 AbstractCegarLoop]: Abstraction has 408288 states and 890021 transitions. [2021-03-10 22:37:31,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 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 22:37:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 408288 states and 890021 transitions. [2021-03-10 22:37:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-03-10 22:37:31,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:37:31,314 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:37:31,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-03-10 22:37:31,514 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:37:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:37:31,515 INFO L82 PathProgramCache]: Analyzing trace with hash 304123099, now seen corresponding path program 171 times [2021-03-10 22:37:31,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:37:31,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219904071] [2021-03-10 22:37:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:37:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:37:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 118 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-03-10 22:37:31,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219904071] [2021-03-10 22:37:31,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567243101] [2021-03-10 22:37:31,577 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 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 22:37:31,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-03-10 22:37:31,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:37:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:37:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:37:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 118 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-03-10 22:37:31,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:37:31,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-03-10 22:37:31,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573991137] [2021-03-10 22:37:31,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:37:31,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:37:31,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:37:31,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:37:31,724 INFO L87 Difference]: Start difference. First operand 408288 states and 890021 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 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 22:37:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:37:33,681 INFO L93 Difference]: Finished difference Result 413118 states and 897655 transitions. [2021-03-10 22:37:33,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:37:33,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 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 96 [2021-03-10 22:37:33,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:37:34,301 INFO L225 Difference]: With dead ends: 413118 [2021-03-10 22:37:34,301 INFO L226 Difference]: Without dead ends: 412992 [2021-03-10 22:37:34,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 Received shutdown request... [2021-03-10 22:37:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412992 states. [2021-03-10 22:37:35,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:37:35,352 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 22:37:35,355 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 22:37:35,355 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:37:35 BasicIcfg [2021-03-10 22:37:35,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:37:35,356 INFO L168 Benchmark]: Toolchain (without parser) took 681686.82 ms. Allocated memory was 337.6 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 318.1 MB in the beginning and 10.9 GB in the end (delta: -10.6 GB). Peak memory consumption was 5.6 GB. Max. memory is 16.0 GB. [2021-03-10 22:37:35,356 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 337.6 MB. Free memory was 319.2 MB in the beginning and 319.2 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:37:35,356 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.82 ms. Allocated memory is still 337.6 MB. Free memory was 317.6 MB in the beginning and 316.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:37:35,356 INFO L168 Benchmark]: Boogie Preprocessor took 14.92 ms. Allocated memory is still 337.6 MB. Free memory was 316.2 MB in the beginning and 315.2 MB in the end (delta: 966.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:37:35,356 INFO L168 Benchmark]: RCFGBuilder took 316.49 ms. Allocated memory is still 337.6 MB. Free memory was 315.1 MB in the beginning and 304.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-10 22:37:35,356 INFO L168 Benchmark]: TraceAbstraction took 681319.91 ms. Allocated memory was 337.6 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 304.0 MB in the beginning and 10.9 GB in the end (delta: -10.6 GB). Peak memory consumption was 5.6 GB. Max. memory is 16.0 GB. [2021-03-10 22:37:35,356 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 0.23 ms. Allocated memory is still 337.6 MB. Free memory was 319.2 MB in the beginning and 319.2 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.82 ms. Allocated memory is still 337.6 MB. Free memory was 317.6 MB in the beginning and 316.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.92 ms. Allocated memory is still 337.6 MB. Free memory was 316.2 MB in the beginning and 315.2 MB in the end (delta: 966.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 316.49 ms. Allocated memory is still 337.6 MB. Free memory was 315.1 MB in the beginning and 304.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 681319.91 ms. Allocated memory was 337.6 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 304.0 MB in the beginning and 10.9 GB in the end (delta: -10.6 GB). Peak memory consumption was 5.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 59). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 681197.0ms, OverallIterations: 184, TraceHistogramMax: 11, EmptinessCheckTime: 23529.2ms, AutomataDifference: 171130.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14157 SDtfs, 47240 SDslu, 61134 SDs, 0 SdLazy, 28407 SolverSat, 4929 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13345.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15729 GetRequests, 12338 SyntacticMatches, 100 SemanticMatches, 3291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27802 ImplicationChecksByTransitivity, 23082.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=414060occurred in iteration=173, InterpolantAutomatonStates: 3243, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 413721.7ms AutomataMinimizationTime, 184 MinimizatonAttempts, 2031560 StatesRemovedByMinimization, 183 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1096.8ms SsaConstructionTime, 2583.6ms SatisfiabilityAnalysisTime, 28576.5ms InterpolantComputationTime, 23752 NumberOfCodeBlocks, 23686 NumberOfCodeBlocksAsserted, 991 NumberOfCheckSat, 23390 ConstructedInterpolants, 0 QuantifiedInterpolants, 104165 SizeOfPredicates, 358 NumberOfNonLiveVariables, 18337 ConjunctsInSsa, 2543 ConjunctsInUnsatCore, 362 InterpolantComputations, 6 PerfectInterpolantSequences, 27882/51848 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown